SPEECH INTELLIGIBILITY and Fire Alarm Voice Communication Systems

Size: px
Start display at page:

Download "SPEECH INTELLIGIBILITY and Fire Alarm Voice Communication Systems"

Transcription

1 SPEECH INTELLIGIBILITY and Fire Alarm Voice Communication Systems WILLIAM KUFFNER, M.A. Sc., P.Eng, PMP Senior Fire Protection Engineer Director Fire Protection Engineering October 30, 2013

2 Code Reference OBC Clause (2) (2) The voice communication system shall be capable of broadcasting messages with voice intelligibility meeting or exceeding the equivalent of a common intelligibility scale score of

3 Intelligibility Assuming that speech, hearing etc. are normal, intelligibility is affected by signal to noise level (sound pressure levels) reverberation (physical property of room) echo (reflection arrives much later than original sound [50+ ms]) distortion (sound system property like amplifier clipping) 3

4 Measuring Intelligibility Several methods, some subjective, others objective Speech Transmission Index (STI) Speech Intelligibility Index (SII) Articulation Loss of Consonants (%Alcons) Phonetically Balanced Word Scores (PBWS) Modified Rhyme Test (MRT) Diagnostic Rhyme Test (DRT) 4

5 Speech Transmission Index (1/3) The speech transmission index (STI) is an objective method. measurement of the amount of modulation preserved in the transmission of an artificial speech signal through a system. IEC standard Objective rating of speech intelligibility by speech transmission index 5

6 Speech Transmission Index (2/3) Physical quantity representing the transmission quality of speech with respect to intelligibility. Accounts for signal to noise ratio as well as reverberation and distortion 98 frequencies accounting for 7 audible octaves (125 Hz to 8 khz) and 15 modulation frequencies (0.63 Hz to12.5 Hz) Weighted average of the sum of modulation frequencies signal to noise ratios of audible spectrum. 6

7 Speech Transmission Index (3/3) Score of a space is determined by producing a characteristic signal which represents the combinations of the audible and modulation spectra to be tested for Signal transmitted through the system under test and then measured in the space under consideration The difference represents a reduction in the intelligibility score of the space. 7

8 Common Intelligibility Scale Common Intelligibility Scale (CIS) relates a speech intelligibility score from one method to another. A suggested pass/fail value for CIS is 0.70 for a given space (relates to 50% score on the STI scale) Building Code Requirement 8

9 Design of Voice Communication Systems Speech intelligibility from a voice communication system perspective - past designs based on signal to noise ratios to meet sound pressure level requirements of Building Codes. empirical method - louder is better 9

10 Design of Voice Communication Systems Speech intelligibility from a voice communication system perspective present current designs based on signal to noise ratios to meet sound pressure level requirements of Building Codes. empirical method - lower power, denser placement of speakers 10

11 Design of Voice Communication Systems Speech intelligibility from a voice communication system perspective future Design for signal to noise ratio or intelligibility measured from the speaker to the listener s ear. algebraic equations design software (itool ) modeling software (Modeler ) 11

12 Algebraic Equations Absorption Coefficient Add the area weighted average of absorption coefficients of surface materials Material α Sound Absorption Coefficient - α - Plaster walls Unpainted brickwork Painted brickwork mm plywood panel mm cork sheet mm porous rubber sheet mm fiberboard on battens mm wood wool cement on battens n α S n S n 12

13 Algebraic Equations Reverberation time for a<0.2, (Sabine) T 0.16V Sα T 0.16V - S[ln(1- α)] (for a>0.2 (Eyring) Where T (s) is the reverberation time, V (m 3 ) is the room volume, S (m 2 ) is the total surface area of all room boundaries, and a is the average absorption coefficient Less than 1.5 seconds in reverberation time indicates that sound pressure level will be the dominant factor in intelligibility 13

14 Algebraic Equations Sound pressure level Determine coverage of speaker based on a spl loss of 6 db as a maximum. Speaker polar plot (performance chart) provides spl losses at various angles (θ). Add inverse square law to loss data 20 log (3/d). Interpolate data to determine angle where spl loss is 6 db Determine coverage radius r = d tan(θ/2) Use coverage radius to project a square that fits inside the circle and determine the coverage area of the speaker as a square A = 2r 2 14

15 Itool Software Each simple room (6 surfaces) is input into the system by providing dimensions (length, width, and height), Surface characteristics of each of the room surfaces are selected from an available list (user defined surfaces and unique surface combinations can be created), A speaker type is selected form an available list (user defined speakers can be created), A speaker layout pattern which represents speaker density is selected, Ambient and required minimum differential sound pressure levels for the room are entered, and Listener height is selected Software calculates reverberation time and creates a speaker layout 15

16 Modeler Software Prepare floor plan layout Select and place speakers Select and place listeners Select and place objects Set surface features 16

17 Modeler Software Use view tools to confirm space and speaker layout Run model software and analyse results 17

18 Modeler Software Sound pressure levels 18

19 Modeler Software STI levels 19

20 Design Results When compared to traditional design methods, designing to achieve intelligibility means at least double the number of speakers will be installed. Simplex predicts coverage areas using their 4902 speaker For a typical 3 m ceiling and a listener height of 1.5 m, a speaker will be placed every 3 m on the ceiling to achieve a 6 db loss coverage pattern. 20

21 Measure Speech Intelligibility Use handheld tools to measure speech intelligibility in finished spaces accounting for the background noise that can be expected to be present during normal operations. 21

22 Tools Goldline Quest SE_DL/index.htm 22

23 Measuring Method Obtain STI or CIS measurements to determine compliance. Generally requires two or more measurements for each speaker to get an overall score for a space Send the signal through the sound system and measure the response in the space under consideration. Take a statistical average of all the floor area readings minus one standard deviation as the overall score (84% confidence) 23

24 Equipment Setup STI-CIS Analyzer Check the batteries Check the calibration date Check the plan for measurements (locations, quantities, etc.) Verify proper equipment operation Background noise measurement Sound pressure calibration Measure spl using analyzer with a voice message playing Initiate the test tone and adjust volume until spl measurement is the same as that taken during voice message test 24

25 Taking readings Take spl and cis measurements at each planned test location Test locations should be equal distance between speakers Take two measurements facing in different directions each time If cis readings differ between measurements by more than 0.3 take a third reading Record spl and cis readings. Note any reading errors that occur, background noise or incidental noises heard during testing. 25

26 Field Notes 26

27 Determining Results Each acoustically unique space should be evaluated separately Rooms separated by walls Areas where significant changes in finishes occur Areas where ceiling height changes by more than 20% Determine the average of all readings taken in the space Determine the standard deviation of the readings The overall intelligibility score is the average less one standard deviation. An individual reading failure should not be taken to mean the area fails 27

28 Determining Results The overall sound pressure level is the average of all readings The values are not intended to be compared to spl requirements in the building code. Those values are for fire alarm signalling equipment not voice communication equipment. 28

29 Reporting No. Floor Area Input SPL Speaker Power Location Reading (dba) (W) CIS/SPL Location Room a b c Average Average Std. Dev CIS Score 1 Office A Office B Office C Office D

30 Questions?

Optiffuser. High-performance, high bandwidth lightweight 1D diffuser.

Optiffuser. High-performance, high bandwidth lightweight 1D diffuser. Optiffuser High-performance, high bandwidth lightweight 1D diffuser. General product information The Optiffuser comes in packs of four panels. Two positives and two negatives (see page 5) per package.

More information

SYSTEM DESIGN AND THE IMPORTANCE OF ACOUSTICS

SYSTEM DESIGN AND THE IMPORTANCE OF ACOUSTICS SYSTEM DESIGN AND THE IMPORTANCE OF ACOUSTICS n Will your communication or emergency notification system broadcast intelligible speech messages in addition to alarm tones? n Will your system include multiple

More information

ROOM ACOUSTICS DESIGN. Room Acoustics Design Intent: Appropriate Articulation

ROOM ACOUSTICS DESIGN. Room Acoustics Design Intent: Appropriate Articulation ROOM ACOUSTICS DESIGN http://mikebm.files.wordpress.com/2008/06/walt-disney-hall-1.jpg Ball State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1 Room Acoustics Design Intent: Appropriate Articulation

More information

Designing for Intelligibility vs. Audibility

Designing for Intelligibility vs. Audibility 273 Branchport Avenue Long Branch, NJ 07740 Phone: (800) 631-2148 Fax: (732) 222-8707 www.coopernotification.com Contact: Marla Moran (941) 487-2318 marla.moran@cooperindustries.com Designing for Intelligibility

More information

Acoustic Terms, Definitions and General Information

Acoustic Terms, Definitions and General Information Acoustic Terms, Definitions and General Information Authored by: Daniel Ziobroski Acoustic Engineer Environmental and Acoustic Engineering GE Energy Charles Powers Program Manager Environmental and Acoustic

More information

ACOUSTICAL CONSIDERATIONS FOR EFFECTIVE EMERGENCY ALARM SYSTEMS IN AN INDUSTRIAL SETTING

ACOUSTICAL CONSIDERATIONS FOR EFFECTIVE EMERGENCY ALARM SYSTEMS IN AN INDUSTRIAL SETTING ACOUSTICAL CONSIDERATIONS FOR EFFECTIVE EMERGENCY ALARM SYSTEMS IN AN INDUSTRIAL SETTING Dennis P. Driscoll, P.E. and David C. Byrne, CCC-A Associates in Acoustics, Inc. Evergreen, Colorado Telephone (303)

More information

2011-06-13. Acoustic design with wall acoustic solutions

2011-06-13. Acoustic design with wall acoustic solutions 2011-06-13 Acoustic design with wall acoustic solutions Introduction A suspended ceiling is by far the most common acoustical treatment in a room. In most cases this is also a sufficient solution to create

More information

Building Technology and Architectural Design. Program 4th lecture 9.00-9.45 Case studies Room Acoustics. 10.00 10.45 Case studies Room Acoustics

Building Technology and Architectural Design. Program 4th lecture 9.00-9.45 Case studies Room Acoustics. 10.00 10.45 Case studies Room Acoustics Building Technology and Architectural Design Program 4th lecture 9.00-9.45 Case studies Room Acoustics 9.45 10.00 Break 10.00 10.45 Case studies Room Acoustics Lecturer Poul Henning Kirkegaard 10-10-2006

More information

PERCENTAGE ARTICULATION LOSS OF CONSONANTS IN THE ELEMENTARY SCHOOL CLASSROOMS

PERCENTAGE ARTICULATION LOSS OF CONSONANTS IN THE ELEMENTARY SCHOOL CLASSROOMS The 21 st International Congress on Sound and Vibration 13-17 July, 2014, Beijing/China PERCENTAGE ARTICULATION LOSS OF CONSONANTS IN THE ELEMENTARY SCHOOL CLASSROOMS Dan Wang, Nanjie Yan and Jianxin Peng*

More information

Direct and Reflected: Understanding the Truth with Y-S 3

Direct and Reflected: Understanding the Truth with Y-S 3 Direct and Reflected: Understanding the Truth with Y-S 3 -Speaker System Design Guide- December 2008 2008 Yamaha Corporation 1 Introduction Y-S 3 is a speaker system design software application. It is

More information

Characterization of acoustics in open offices - four case studies

Characterization of acoustics in open offices - four case studies Characterization of acoustics in open offices - four case studies J. S Keränen, P. Virjonen and V. O Hongisto Finnish Institute of Occupational Health, Lemminkäisenkatu 14-18 B, 5 Turku, Finland jukka.keranen@ttl.fi

More information

VIRTUAL SPACE 4D PROJECT: THE ROOM ACOUSTICAL TOOL. J. Keränen, P. Larm, V. Hongisto

VIRTUAL SPACE 4D PROJECT: THE ROOM ACOUSTICAL TOOL. J. Keränen, P. Larm, V. Hongisto VIRTUAL SPACE 4D PROJECT: THE ROOM ACOUSTICAL TOOL David Oliva University of Turku Department of Physics FIN-20014 Turku, Finland. david.elorza@ttl.fi J. Keränen, P. Larm, V. Hongisto Finnish Institute

More information

Acoustical Design of Rooms for Speech

Acoustical Design of Rooms for Speech Construction Technology Update No. 51 Acoustical Design of Rooms for Speech by J.S. Bradley This Update explains the acoustical requirements conducive to relaxed and accurate speech communication in rooms

More information

Relationship between Sound Pressure and Sound Power Levels

Relationship between Sound Pressure and Sound Power Levels Relationship between Sound Pressure and Sound Power Levels 4 W. T. W. CORY Chairman of the Eurovent WG 1 Fans If we wish to know the sound power transmitted through a fan and ducting system, it is preferable

More information

ACOUSTIC DESIGN - ROOMS FOR SPEECH

ACOUSTIC DESIGN - ROOMS FOR SPEECH Auckland Christchurch Kuala Lumpur Melbourne Sydney Wellington www.marshallday.com ACOUSTIC DESIGN - ROOMS FOR SPEECH EVER BEEN AT A LECTURE OR CONFERENCE AND FOUND IT DIFFICULT TO UNDERSTAND WHAT IS BEING

More information

Acoustics of indoor sports halls and gymnasia

Acoustics of indoor sports halls and gymnasia Acoustics of indoor sports halls and gymnasia Robert Conetta 1, Bridget Shield 1, Trevor Cox 2, Charlie Mydlarz 2, Julie Dockrell 3, Daniel Connolly 3 1 London South Bank University 2 University of Salford

More information

Fire. The Fire Installers Mate. A guide to fire alarm systems design

Fire. The Fire Installers Mate. A guide to fire alarm systems design Fire The Fire Installers Mate A guide to fire alarm systems design BS 5839 Part 1:2002 A guide to BS 5839 Part 1:2002 Disclaimer This booklet is not intended to be a comprehensive guide to all aspects

More information

Generic - Hearing Loop - (AFILS) U.S. System Specification

Generic - Hearing Loop - (AFILS) U.S. System Specification This document is a generic specification for any Hearing Loop (Audio Frequency Induction Loop System). For the remainder of the document, we will refer to using the term Hearing Loop rather than Audio

More information

Affordable Sports Halls

Affordable Sports Halls Creating a sporting habit for life Appendix 5 Acoustics (To be read in conjunction with the main document) Speech Intelligibility with 40dBA Ambient Noise (BB93 Compliant) Affordable Sports Halls August

More information

Dynamic sound source for simulating the Lombard effect in room acoustic modeling software

Dynamic sound source for simulating the Lombard effect in room acoustic modeling software Dynamic sound source for simulating the Lombard effect in room acoustic modeling software Jens Holger Rindel a) Claus Lynge Christensen b) Odeon A/S, Scion-DTU, Diplomvej 381, DK-2800 Kgs. Lynby, Denmark

More information

8. ACOUSTICS OF ROOMS AND ENCLOSURES

8. ACOUSTICS OF ROOMS AND ENCLOSURES NOISE CONTROL Room Acoustics 8.1 8. ACOUSTICS OF ROOMS AND ENCLOSURES 8.1 Introduction This section covers the acoustics of enclosed spaces. Upon completion, the reader should have a basic understanding

More information

Outer Diameter 23 φ mm Face side Dimension 20.1 φ mm. Baffle Opening. Normal 0.5 Watts Maximum 1.0 Watts Sine Wave.

Outer Diameter 23 φ mm Face side Dimension 20.1 φ mm. Baffle Opening. Normal 0.5 Watts Maximum 1.0 Watts Sine Wave. 1. MODEL: 23CR08FH-50ND 2 Dimension & Weight Outer Diameter 23 φ mm Face side Dimension 20.1 φ mm Baffle Opening 20.1 φ mm Height Refer to drawing Weight 4.0Grams 3 Magnet Materials Rare Earth Size φ 9.5

More information

Acoustical Design for Concert Hall in the Science and Art Centre of Xiamen University

Acoustical Design for Concert Hall in the Science and Art Centre of Xiamen University Acoustical Design for Concert Hall in the Science and Art Centre of Xiamen University Yuezhe Zhao, Shuoxian Wu State Key Laboratory of Subtropical Building Sciences, South China University of Technology,

More information

Acoustic design according to room type

Acoustic design according to room type according to room type The purpose of the room is decisive for the acoustic environment to be created. In rooms for speech, such as classrooms and auditoriums, it is important to ensure a good level of

More information

P. D Antonio. RPG Diffusor Systems, Inc. Contact: pdantonio@rpginc.com

P. D Antonio. RPG Diffusor Systems, Inc. Contact: pdantonio@rpginc.com Acoustical Design of Speech Rooms using the Complete Acoustical Palette: Absorption, Reflection, Diffusion and Isolation P. D Antonio RPG Diffusor Systems, Inc. Contact: pdantonio@rpginc.com ABSTRACT In

More information

Airborne Sound Insulation

Airborne Sound Insulation Airborne Sound Insulation with XL2-TA Sound Level Meter This application note describes the verification of the airborne sound insulation in buildings with the XL2-TA Sound Level Meter. All measurements

More information

PS 29M DUAL CHANNEL BELTPACK IN METAL CASE

PS 29M DUAL CHANNEL BELTPACK IN METAL CASE PS 29M DUAL CHANNEL BELTPACK IN METAL CASE USER MANUAL October 2013 This product is designed and manufactured by: ASL Intercom BV Zonnebaan 42 3542 EG Utrecht The Netherlands Phone: +31 (0)30 2411901 Fax:

More information

TECHNOLOGY RESEARCH AND DEVELOPMENT More Than Alarm Anna Kołodziej-Saramak

TECHNOLOGY RESEARCH AND DEVELOPMENT More Than Alarm Anna Kołodziej-Saramak TECHNOLOGY RESEARCH AND DEVELOPMENT More Than Alarm Anna Kołodziej-Saramak The purpose of the voice alarm systems (VAS) is to inform people about hazards in a possibly efficient way (which, unfortunately,

More information

Acoustic analysis by computer simulation for building restoration

Acoustic analysis by computer simulation for building restoration Acoustic analysis by computer simulation for building restoration Enrico Dassori & Tiziana Ottonello Istituto di Architettura e tecnica Urbanistica (IATU), Università di Genova Architecture and town planing

More information

Workshop Perceptual Effects of Filtering and Masking Introduction to Filtering and Masking

Workshop Perceptual Effects of Filtering and Masking Introduction to Filtering and Masking Workshop Perceptual Effects of Filtering and Masking Introduction to Filtering and Masking The perception and correct identification of speech sounds as phonemes depends on the listener extracting various

More information

RoomMatch Utility RMU206 TECHNICAL DATA SHEET. small-format under-balcony fill loudspeaker. Key Features. Technical Specifications

RoomMatch Utility RMU206 TECHNICAL DATA SHEET. small-format under-balcony fill loudspeaker. Key Features. Technical Specifications Key Features Award-winning RoomMatch sound now in smaller, 2-way, point-source designs for high-level foreground music, under-balcony, and zone-fill applications Bose EMB2 compression driver for lower

More information

42 83 OFF 330 650 1.3k. Speaker. Guide

42 83 OFF 330 650 1.3k. Speaker. Guide 42 83 OFF 330 650 1.3k Speaker Guide Table of Contents List of Figures... viii Chapter 1: Chapter 2: Getting Started: System Design Steps...10 System Applications...12 Paging...12 Speech Reinforcement...12

More information

Understanding Sound System Design and Feedback Using (Ugh!) Math by Rick Frank

Understanding Sound System Design and Feedback Using (Ugh!) Math by Rick Frank Understanding Sound System Design and Feedback Using (Ugh!) Math by Rick Frank Shure Incorporated 222 Hartrey Avenue Evanston, Illinois 60202-3696 (847) 866-2200 Understanding Sound System Design and

More information

Speech Privacy & Sound Masking in modern architecture

Speech Privacy & Sound Masking in modern architecture Speech Privacy & Sound Masking in modern architecture Presented By Todd Berger CET, CTS-D, DMC-D Field Sales Engineer Cambridge Sound Management AIA Registered Provider continuing education credits Cambridge

More information

Acoustic design of schools: performance standards. From 2003 to 2014: a brief guide to the changes in BB 93. by Jack Harvie-Clark, 9th January 2015

Acoustic design of schools: performance standards. From 2003 to 2014: a brief guide to the changes in BB 93. by Jack Harvie-Clark, 9th January 2015 Acoustic design of schools: performance standards From 2003 to 2014: a brief guide to the changes in BB 93. by Jack Harvie-Clark, 9th January 2015 This document should be read in conjunction with the new

More information

Acoustic design according to room shape

Acoustic design according to room shape Acoustic design according to room shape The shape of the room defines the movement of the sound waves within the room. Placement of acoustic materials should be determined by the way the sound moves in

More information

Lab #6 Room Acoustics

Lab #6 Room Acoustics EQUIPMENT Physics of Music PHY103 Lab Manual Lab #6 Room Acoustics Tape measures Noise making devices (pieces of wood for clappers). Microphones, stands, preamps connected to computers. Extra XLR microphone

More information

THE MEASUREMENT OF SPEECH INTELLIGIBILITY

THE MEASUREMENT OF SPEECH INTELLIGIBILITY THE MEASUREMENT OF SPEECH INTELLIGIBILITY Herman J.M. Steeneken TNO Human Factors, Soesterberg, the Netherlands 1. INTRODUCTION The draft version of the new ISO 9921 standard on the Assessment of Speech

More information

Sound Attenuation INTRODUCTION

Sound Attenuation INTRODUCTION INTRODUCTION In the broadest sense, a sound wave is any disturbance that is propagated in an elastic medium, which may be a gas, a liquid, or a solid. Noise is defined as any unwanted sound perceived by

More information

Design of an Acoustic Anechoic Chamber for Application in Hearing Aid Research

Design of an Acoustic Anechoic Chamber for Application in Hearing Aid Research Design of an Acoustic Anechoic Chamber for Application in Hearing Aid Research MARC S. RESSL 1 PABLO E. WUNDES 2 GEDA (Grupo de Electrónica Digital Aplicada) Buenos Aires Institute of Technology (ITBA)

More information

Fire Alarm Engineering Best Practices. CFAA NCA Technical Seminar 2014

Fire Alarm Engineering Best Practices. CFAA NCA Technical Seminar 2014 Fire Alarm Engineering Best Practices CFAA NCA Technical Seminar 2014 2 Overview Code Compliance Equipment Selection and Layout Drawings, Specifications Commissioning and Acceptance Miscellaneous Goals

More information

to control interfering reflections and provide an ambient sound field using diffusion instead of

to control interfering reflections and provide an ambient sound field using diffusion instead of The First Two Dimensional Primitive Root Diffusor From The Acoustical Industry s Leading Innovator Interfering reflections can be controlled by absorption or diffusion.in small rooms,it is often desirable

More information

AUDIO. 1. An audio signal is an representation of a sound. a. Acoustical b. Environmental c. Aesthetic d. Electrical

AUDIO. 1. An audio signal is an representation of a sound. a. Acoustical b. Environmental c. Aesthetic d. Electrical Essentials of the AV Industry Pretest Not sure if you need to take Essentials? Do you think you know the basics of Audio Visual? Take this quick assessment test on Audio, Visual, and Systems to find out!

More information

Acoustical Design of a Multi-Purpose Hall for Natural and Amplified Sound

Acoustical Design of a Multi-Purpose Hall for Natural and Amplified Sound Acoustical Design of a Multi-Purpose Hall for Natural and Amplified Sound Dirun Ergin Talayman Acoustics Ltd, Istanbul, Turkey. Zerhan Yüksel Can Yıldız Technical University, Istanbul, Turkey. Summary

More information

The challenging duty of the sales person, engineer, or

The challenging duty of the sales person, engineer, or Basic Principles of Audio Design in Conferencing by Ryan Shannon 2014 Participating in a video or audio conference is an individually subjective experience (indeed, every experience is individually subjective).

More information

How does Architecture Affect the Acoustics of a Space

How does Architecture Affect the Acoustics of a Space How does Architecture Affect the Acoustics of a Space Grade Level This lesson plan was developed for a 9 th grade Physical Science Class. Objectives To develop aural senses of spatial awareness To understand

More information

Test Report. Nr. 1370-001-12 dated 16.02.2012. Sound Absorption Coefficient in the Reverberation Room. Lammengatan 2 SE-360 30 Lammhult Sweden

Test Report. Nr. 1370-001-12 dated 16.02.2012. Sound Absorption Coefficient in the Reverberation Room. Lammengatan 2 SE-360 30 Lammhult Sweden Test Report Nr. 1370-001-12 dated 16.02.2012 Sound Absorption Coefficient in the Reverberation Room Customer: Abstracta AB Lammengatan 2 SE-360 30 Lammhult Sweden Test Object: Arrangement of Acoustic Panels

More information

PAGE 2. Figure 1: Difference between PWL ins and SPL 1m

PAGE 2. Figure 1: Difference between PWL ins and SPL 1m PAGE 1 Pipe noise J.H. Granneman and R.P.M. Jansen, Peutz Consulting Engineers, The Netherlands, emphasise the need for an adequate pipe noise control procedure, with reference to the design phase, insulation

More information

Sound Pressure Measurement

Sound Pressure Measurement Objectives: Sound Pressure Measurement 1. Become familiar with hardware and techniques to measure sound pressure 2. Measure the sound level of various sizes of fan modules 3. Calculate the signal-to-noise

More information

PURE TONE AUDIOMETER

PURE TONE AUDIOMETER PURE TONE AUDIOMETER V. Vencovský, F. Rund Department of Radioelectronics, Faculty of Electrical Engineering, Czech Technical University in Prague, Czech Republic Abstract Estimation of pure tone hearing

More information

How To Make A Supply Air Ceiling

How To Make A Supply Air Ceiling Supply air ceiling General is a supply air ceiling system with adjustable discs. The spread pattern is infinitely flexible and can be adjusted as required without affecting the airflow, pressure drop or

More information

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: VL-WDW11 VistaLuxe Awning

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: VL-WDW11 VistaLuxe Awning ACOUSTIC Page 1 of 5 SOUND TRANSMISSION CLASS TEST REPORT Series/Model: VL-WDW11 VistaLuxe Awning Prepared for: Koble & Kolbe Millwork Co., Inc. Attn: Ms. Tasha Verhasselt 1323 South 11th Avenue Wausau,

More information

How To Reduce Noise From A Test Screen

How To Reduce Noise From A Test Screen Practical Approaches to Engineering Noise Controls Dave Yantek Mining Hearing Loss Prevention Workshop June 21-22, 22, 2005 Pittsburgh Research Laboratory Basics of sound Topics Measurement of sound Measurement

More information

APPLICATION GUIDE. Subwoofer-Satellite Systems. Using Control SB-210 & SB-2 Subwoofers. System #5 in Stereo

APPLICATION GUIDE. Subwoofer-Satellite Systems. Using Control SB-210 & SB-2 Subwoofers. System #5 in Stereo APPLICATION GUIDE Subwoofer- Systems Using Control SB-210 & SB-2 Subwoofers System #5 in Stereo SPL (at 20 Feet): 94 db Continuous (peaks of 104 db) Stereo / Mono Selector: Stereo 4-Ohm / 8-Ohm Selector:

More information

Acoustics of the Teatro Arcimboldi in Milano. Part 2: Scale model studies, final results

Acoustics of the Teatro Arcimboldi in Milano. Part 2: Scale model studies, final results AUDITORIUM ACOUSTICS 2 Imperial College (London), 19-21 July 22 Acoustics of the Teatro Arcimboldi in Milano. Part 2: Scale model studies, final results D. Commins (1), R. Pompoli (2), A. Farina (3), P.

More information

>1@$UFKLWHFWXUHDFRXVWLFVPHDVXUHPHQWVDQGGHVLJQDFKXUFK DQGDQDXGLWRULXP

>1@$UFKLWHFWXUHDFRXVWLFVPHDVXUHPHQWVDQGGHVLJQDFKXUFK DQGDQDXGLWRULXP 7KHQG,QWHUQDWLRQDO&RQJUHVVDQG([SRVLWLRQRQ1RLVH&RQWURO(QJLQHHULQJ -HMX,QWHUQDWLRQDO&RQYHQWLRQ&HQWHU6HRJZLSR.RUHD $XJXVW >1@$UFKLWHFWXUHDFRXVWLFVPHDVXUHPHQWVDQGGHVLJQDFKXUFK DQGDQDXGLWRULXP First Author:

More information

How To Control Noise In A C7 Data Center Server Room

How To Control Noise In A C7 Data Center Server Room Brigham Young University Acoustical Analysis of Active Control in the Server Room of a C7 Data Centers Colocation Facility Feasibility Report Advisor: Dr. Scott Sommerfeldt C7 Data Centers representative:

More information

A Microphone Array for Hearing Aids

A Microphone Array for Hearing Aids A Microphone Array for Hearing Aids by Bernard Widrow 1531-636X/06/$10.00 2001IEEE 0.00 26 Abstract A directional acoustic receiving system is constructed in the form of a necklace including an array of

More information

What Audio Engineers Should Know About Human Sound Perception. Part 2. Binaural Effects and Spatial Hearing

What Audio Engineers Should Know About Human Sound Perception. Part 2. Binaural Effects and Spatial Hearing What Audio Engineers Should Know About Human Sound Perception Part 2. Binaural Effects and Spatial Hearing AES 112 th Convention, Munich AES 113 th Convention, Los Angeles Durand R. Begault Human Factors

More information

EVID Compact Sound Speaker System

EVID Compact Sound Speaker System EVID Compact Sound Speaker System EVID-C44, EVID-C2.1, EVID-40C, EVID-S44, EVID-S44W, EVID-2.1, EVID-2.1W, EVID-40S, and EVID-40SW en Installation Manual en 3 Table of contents 1 Safety 4 2 Welcome 6

More information

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR1 Teutonic Outswing Vinyl Entrance Door

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR1 Teutonic Outswing Vinyl Entrance Door ACOUSTIC Page of 5 9/8/204 SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR Teutonic Outswing Vinyl Entrance Door Prepared for: Kolbe and Kolbe Millwork Co., Inc. Attn: Ms. Tasha Verhasselt 323

More information

Public Address and Voice Alarm

Public Address and Voice Alarm Training Presentation Public Address and Voice Alarm Slide 1 Contents Introduction What is Voice Alarm? What are the benefits? What standards apply? Intelligibility requirements Issues when designing VA

More information

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR2 Teutonic Outswing Vinyl Entrance Door

SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR2 Teutonic Outswing Vinyl Entrance Door ACOUSTIC Page of 5 SOUND TRANSMISSION CLASS TEST REPORT Series/Model: T-DR2 Teutonic Outswing Vinyl Entrance Door Prepared for: Kolbe and Kolbe Millwork Co., Inc. Attn: Ms. Tasha Verhasselt 323 South th

More information

AVAILABLE TO DOWNLOAD ON THE APOLLO APP. Fire Alarm Systems Design. a guide to BS5839

AVAILABLE TO DOWNLOAD ON THE APOLLO APP. Fire Alarm Systems Design. a guide to BS5839 AVAILABLE TO DOWNLOAD ON THE APOLLO APP a guide to Fire Alarm Systems Design BS5839 Part1:2013 The Regulatory Reform (Fire Safety) Order (FSO) became law on 1 October 2006 Legally you must comply! What

More information

Noise. CIH Review PDC March 2012

Noise. CIH Review PDC March 2012 Noise CIH Review PDC March 2012 Learning Objectives Understand the concept of the decibel, decibel determination, decibel addition, and weighting Know the characteristics of frequency that are relevant

More information

Aircraft cabin noise synthesis for noise subjective analysis

Aircraft cabin noise synthesis for noise subjective analysis Aircraft cabin noise synthesis for noise subjective analysis Bruno Arantes Caldeira da Silva Instituto Tecnológico de Aeronáutica São José dos Campos - SP brunoacs@gmail.com Cristiane Aparecida Martins

More information

PRODUCT SHEET OUT1 SPECIFICATIONS

PRODUCT SHEET OUT1 SPECIFICATIONS OUT SERIES Headphones OUT2 BNC Output Adapter OUT1 High Fidelity Headphones OUT1A Ultra-Wide Frequency Response Headphones OUT3 see Stimulators OUT100 Monaural Headphone 40HP Monaural Headphones OUT101

More information

THE MARIA REGINA DELLA PACE CHURCH IN PERUGIA: ACOUSTIC MEASUREMENTS AND CORRECTION DESIGN

THE MARIA REGINA DELLA PACE CHURCH IN PERUGIA: ACOUSTIC MEASUREMENTS AND CORRECTION DESIGN THE MARIA REGINA DELLA PACE CHURCH IN PERUGIA: ACOUSTIC MEASUREMENTS AND CORRECTION DESIGN Cinzia Buratti*, Rita Mariani, Irene Costarelli Department of Industrial Engineering, Perugia University, Via

More information

The Acoustics of Indoor Aquatic Facilities: How Improving Sound Levels Impacts Both our Physiological and Psychological Well Being Jeffrey Madison

The Acoustics of Indoor Aquatic Facilities: How Improving Sound Levels Impacts Both our Physiological and Psychological Well Being Jeffrey Madison The Acoustics of Indoor Aquatic Facilities: How Improving Sound Levels Impacts Both our Physiological and Psychological Well Being Jeffrey Madison A lifelong musician, Jeff began his career in 1992 when

More information

THE SIMULATION OF MOVING SOUND SOURCES. John M. Chowning

THE SIMULATION OF MOVING SOUND SOURCES. John M. Chowning THE SIMULATION OF MOVING SOUND SOURCES John M. Chowning The Center for Computer Research in Music and Acoustics (CCRMA) Department of Music Stanford University, Stanford, CA 94306 jmc165@home.com (first

More information

Building Design for Advanced Technology Instruments Sensitive to Acoustical Noise

Building Design for Advanced Technology Instruments Sensitive to Acoustical Noise Building Design for Advanced Technology Instruments Sensitive to Acoustic Noise Michael Gendreau Colin Gordon & Associates Presentation Outline! High technology research and manufacturing instruments respond

More information

ARTICLE. Sound in surveillance Adding audio to your IP video solution

ARTICLE. Sound in surveillance Adding audio to your IP video solution ARTICLE Sound in surveillance Adding audio to your IP video solution Table of contents 1. First things first 4 2. Sound advice 4 3. Get closer 5 4. Back and forth 6 5. Get to it 7 Introduction Using audio

More information

Speech Intelligibility

Speech Intelligibility Speech Intelligibility Measurement with XL2 Analyzer The XL2 Analyzer measures the speech intelligibility according to the latest revision of standard IEC 60268-16:2011 (edition 4) and older editions.

More information

MICROPHONE SPECIFICATIONS EXPLAINED

MICROPHONE SPECIFICATIONS EXPLAINED Application Note AN-1112 MICROPHONE SPECIFICATIONS EXPLAINED INTRODUCTION A MEMS microphone IC is unique among InvenSense, Inc., products in that its input is an acoustic pressure wave. For this reason,

More information

VIPAC ENGINEERS & SCIENTISTS

VIPAC ENGINEERS & SCIENTISTS VIPAC ENGINEERS & SCIENTISTS Vipac Engineers & Scientists Limited A.B.N. 33 005 453 627 The Victorian Technology Centre Private Bag 16, Port Melbourne, VIC, 3207, AUSTRALIA Telephone +61 3 9647 9700, Facsimile

More information

ENGINEERING DATA. Fan Sound & Sound Ratings

ENGINEERING DATA. Fan Sound & Sound Ratings Information and Recommendations for the Engineer ED-300 ENGINEERING DATA Aerovent TC Ventco Fiber-Aire Twin City Fan & Blower TC Axial Clarage Fan Sound & Sound Ratings Introduction Small, repetitive pressure

More information

JdB Sound Acoustics Presents

JdB Sound Acoustics Presents JdB Sound Acoustics Presents KINGSTON ROAD UNITED CHURCH S A N C T U A RY A C O U S T I C S A N D S O U N D S Y S T E M B Y J O S E P H D E B U G L I O 2 0 0 8 Copyright by Joseph De Buglio 2008 The Beginning

More information

THE ACOUSTIC DESIGN OF THE NEW DRAMA HOUSE FOR THE ROYAL THEATRE IN COPENHAGEN

THE ACOUSTIC DESIGN OF THE NEW DRAMA HOUSE FOR THE ROYAL THEATRE IN COPENHAGEN THE ACOUSTIC DESIGN OF THE NEW DRAMA HOUSE FOR THE ROYAL THEATRE IN COPENHAGEN A C Gade B Mortensen Gade & Mortensen Akustik A/S, Charlottenlund, Denmark,acg@gade-mortensen.dk Gade & Mortensen Akustik

More information

Sound Power Measurement

Sound Power Measurement Sound Power Measurement A sound source will radiate different sound powers in different environments, especially at low frequencies when the wavelength is comparable to the size of the room 1. Fortunately

More information

RoomMatch Utility RMU105 TECHNICAL DATA SHEET. ultra-compact foreground/fill loudspeaker. Key Features. Technical Specifications

RoomMatch Utility RMU105 TECHNICAL DATA SHEET. ultra-compact foreground/fill loudspeaker. Key Features. Technical Specifications Key Features Award-winning RoomMatch sound now in smaller, 2-way, point-source designs for high-level foreground music, under-balcony, zone-fill and vocalrange floor monitor applications Bose EMB2 compression

More information

Spectrum Level and Band Level

Spectrum Level and Band Level Spectrum Level and Band Level ntensity, ntensity Level, and ntensity Spectrum Level As a review, earlier we talked about the intensity of a sound wave. We related the intensity of a sound wave to the acoustic

More information

INTERNATIONAL ANNEX III. Technical Details of Sound Signal Appliances

INTERNATIONAL ANNEX III. Technical Details of Sound Signal Appliances INTERNATIONAL ANNEX III Technical Details of Sound Signal Appliances 1. Whistles (a) Frequencies and range of audibility The fundamental frequency of the signal shall lie within the range 70-700 Hz. The

More information

Build Green Schools. Click on this link http://www.buildgreenschools.org/ for more information.

Build Green Schools. Click on this link http://www.buildgreenschools.org/ for more information. April 22, 2009 GP #6 Build Green Schools Click on this link http://www.buildgreenschools.org/ for more information. Virginia Beach Middle School- Registered LEED for Schools 2.0 Sold by Robert W. Hayes

More information

Manual Analysis Software AFD 1201

Manual Analysis Software AFD 1201 AFD 1200 - AcoustiTube Manual Analysis Software AFD 1201 Measurement of Transmission loss acc. to Song and Bolton 1 Table of Contents Introduction - Analysis Software AFD 1201... 3 AFD 1200 - AcoustiTube

More information

Voice Evacuation Systems

Voice Evacuation Systems A P P L I C A T I O N S G U I D E Voice Evacuation Systems APPLICATIONS GUIDE: VOICE EVACUATION SYSTEMS Voice Evacuation Systems Contents Section 1: Introduction...3 What is the driving factor for voice

More information

INTER-NOISE 2006 3-6 DECEMBER 2006 HONOLULU, HAWAII, USA

INTER-NOISE 2006 3-6 DECEMBER 2006 HONOLULU, HAWAII, USA INTER-NOISE 2006 3-6 DECEMBER 2006 HONOLULU, HAWAII, USA An effective new approach to isolate plumbing stub-outs in residential construction Jeffrey P. Kwolkoski, P.E., INCE Bd. Cert. a D. L. Adams Associates,

More information

APPLICATION NOTE AP050830

APPLICATION NOTE AP050830 APPLICATION NOTE AP050830 Selection and use of Ultrasonic Ceramic Transducers Pro-Wave Electronics Corp. E-mail: sales@pro-wave.com.tw URL: http://www.prowave.com.tw The purpose of this application note

More information

AS COMPETITION PAPER 2008

AS COMPETITION PAPER 2008 AS COMPETITION PAPER 28 Name School Town & County Total Mark/5 Time Allowed: One hour Attempt as many questions as you can. Write your answers on this question paper. Marks allocated for each question

More information

Dolby Atmos Enabled Speaker Technology

Dolby Atmos Enabled Speaker Technology Dolby Atmos Enabled Speaker Technology April 2015 How to get Dolby Atmos sound with Dolby Atmos enabled speakers Many leading Hollywood movies, including Academy Award winners, are presented in Dolby Atmos.

More information

Speech as input for technical measures

Speech as input for technical measures Speech as input for technical measures Carsten Daugaard DELTA, Edisonvej 24, 5000 Odense C, Denmark, cd@delta.dk Ellen Raben Pedersen Institute of Technology and Innovation, University of Southern Denmark,

More information

Acoustics of Modern and Old Museums

Acoustics of Modern and Old Museums Denver, Colorado NOISE-CON 2013 2013 August 26-28 Acoustics of Modern and Old Museums António P.O. Carvalho Hélder J.S. Gonçalves Luísa M.M. Garcia Laboratory of Acoustics, College of Engineering, University

More information

Antennas & Propagation. CS 6710 Spring 2010 Rajmohan Rajaraman

Antennas & Propagation. CS 6710 Spring 2010 Rajmohan Rajaraman Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception

More information

TV hearing aid BL-8008A BL-8008B. Manual

TV hearing aid BL-8008A BL-8008B. Manual TV hearing aid BL-8008A BL-8008B Manual A. Product instruction 1. What is TV hearing aid 2. Theory 3. Features 4. Functions 4.1 TV hearing aid function 4.2 Normal hearing aid function 4.3 Wired hearing

More information

Guidelines for video conferencing room acoustics. D14377.01 September 2010

Guidelines for video conferencing room acoustics. D14377.01 September 2010 Guidelines for video conferencing room acoustics D14377.01 September 2010 Video conferencing room acoustics Does the audio quality fail to meet your expectations? Do you feel tired when spending longer

More information

CASE STUDY. Sarakasi Theatre Nairobi, Kenya Room Acoustical Measurements and Modelling. Africa Room Acoustics DIRAC and ODEON

CASE STUDY. Sarakasi Theatre Nairobi, Kenya Room Acoustical Measurements and Modelling. Africa Room Acoustics DIRAC and ODEON CASE STUDY Sarakasi Theatre Nairobi, Kenya Room Acoustical Measurements and Modelling Africa Room Acoustics DIRAC and ODEON In November 2008, room acoustical measurements were performed inside the Sarakasi

More information

Introduction Ericsson Handheld Telephone 1341-B

Introduction Ericsson Handheld Telephone 1341-B Ericsson Handheld Telephone 1341-B 2 Contents General 5 The Mobile Telephone Network 6 Base Station and Cell 7 Radio Channels 7 Radio Coverage 8 Transmission Control and Communication 9 Quality Control

More information

B. Equipment shall be furnished and installed as specified. No substitutions will be allowed.

B. Equipment shall be furnished and installed as specified. No substitutions will be allowed. CLASSROOM SOUNDFIELD DISTRIBUTION SYSTEM PART 1 GENERAL 1.1 RELATED DOCUMENTS: A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification

More information

Acoustics & Building Services An back to basics overview

Acoustics & Building Services An back to basics overview Acoustics & Building Services An back to basics overview Prepared for 20 th March 2012 ASK Consulting Engineers Since 1993, ASK Consulting Engineers has been providing clients from both the private and

More information

EVID S UP E R B SOUND MADE SIMPLE

EVID S UP E R B SOUND MADE SIMPLE EVID C O M P A C T S O U N D S UP E R B SOUND MADE SIMPLE EVID COMPACT SOUND Flexible, scalable background music (BGM) solution for a wide range of architectural environments, including retail spaces,

More information

The Role of Acoustics in Curtain Wall Design:

The Role of Acoustics in Curtain Wall Design: The Role of Acoustics in Curtain Wall Design: Strategies to Achieve Desired Performance Criteria April 22, 2015 John LoVerde, Principal VENEKLASEN ASSOCIATES, INC. Goals Basics of Acoustics Ratings in

More information