How To Make A Ceiling Tile Loudspeaker

Transcription

1 11/2008 PERFORMANCE CEILINGS More scope for innovation HEARD AND NOT SEEN SOUNDMOSAIC The latest in integrated ceiling tile loudspeakers MADE IN GERMANY

2 AMF SOUNDMOSAIC. SIMPLE. AESTHETIC. EFFICIENT. The newly developed AMF Soundmosaic is a flatpanel (membrane) loudspeaker in a modular ceiling format, working on the principle of wave conversion. This means the mineral fibre ceiling tile itself is the loudspeaker, the oscillation being produced by a module on the reverse of the tile. As a result the ceiling tile looks identical to the rest of the AMF ceiling. AMF Soundmosaic is available in all classic THERMATEX face patterns. The wave converter as the source of oscillation constitutes a significant part of the loud speaker system. To optimise the effect of the sound, the adjoining tiles are integrated and linked to each other by holddown clips. The low weight of the product allows for the system to be installed in both newbuild and retrofit or refurbishments without the need to alter the ceiling grid. The mechanical installation of the Soundmosaic is like that of any AMF mineral fibre ceiling tile. Please refer to the installation instructions for AMF System C. For ideal sound reproduction the installation should be done at least in the second (ideally at least in the third) row from the perimeter. Please avoid the connecting cable resting on the reverse of the ceiling tiles which might give rise to unwanted vibrations. The individual tiles are connected to each other by holddown clips (at least two clips for each tile edge). Consequently, nine AMF ceiling tiles are interconnected to each other in total, i.e. besides the centrally arranged a module a further eight surrounding tiles. Number of clips required for each Soundmosaic: minimum of 24. 2

3 AMF SOUNDMOSAIC. ADVANTAGES THAT COUNT. BLENDS IN WITH THE REST OF THE CEILING Once installed the AMF SOUNDMOSAIC looks identical to the rest of the ceiling. EASY INSTALLATION Easy installation in AMF System C exposed grid FIRE PROTECTION Maintaining the fire rating of the ceiling UNIFORM SOUND EMISSION Balanced sound and speech intelligibility for large areas with only a few flatpanel loudspeakers DESIGN AMF SOUNDMOSAIC is available in all classic Thermatex face patterns RETROFIT POSSIBLE Easy integration into existing AMF ceilings 3

4 Speech intelligibility As a result of the surfaceemitted sound the AMF Soundmosaic offers a high degree of sound quality and speech intelligibility over greater distances. While traditional conical loudspeakers offer higher values in adjacent areas (in combination with greater volume) a flatpanel loudspeaker gives considerable advantages for the total area that is to be exposed to sound. Due to the broad sound emission (vertically close to 180 ) over the entire frequency range, the quantity of loudspeakers required for uniform coverage even for large areas is greatly reduced. Interference at individual frequencies can be a problem with conical loudspeakers in certain room locations (proximity to walls). This problem does not occur with the AMF Soundmosaic due to its special technology. This guarantees a uniform intelligibility irrespective of the position of the listener. AMF SOUNDMOSAIC c. 10 m Conical loudspeaker c. 5 m 4

5 SOUND LEVEL The performance test opposite gives a practical performance comparison of the AMF Soundmosaic and a traditional conical loudspeaker. The difference in performance over distance for the same source level of 80 db is clearly evident. For conical loudspeakers the sound energy is concentrated in the immediate area around the point of installation, only for the sound to depreciate quickly over distance. At a distance of 8 metres this means a real drop of approx. 20 db. 80 db 70 db AMF Soundmosaic As a broad comparison, a difference of 10 db means a doubling or halving respectively of sound volume. As a result of this, the installation of conical loudspeakers means their signals are heard as too loud close to the loudspeaker; and as too quiet at some distance. Uniform sound coverage can only be achieved by installing a multitude of loudspeakers. 0 m The sound coverage by a flatpanel loudspeaker (such as the Performance Diagram AMF Soundmosaic) is much more uniform and the depreciation of sound volume over distance is almost linear. Unpleasant peak levels near the source are avoided, without being perceived as too quiet over distance. In comparison with a conventional loudspeaker that is installed in a ceiling the AMF Soundmosaic can be operated at about 10 db less volume for the same perceived sound coverage over the same area. 60 db Conical louspeaker Lay out With an ideal balance of speech intelligibility and an even sound level (the constant distribution of sound intensity in a room) an AMF Soundmosaic can acoustically cover an area of 10 x 10 m. However that at least two modules should be installed per room for adequate reproduction of stereo sound. 5 m 20 m 10 m 5 m 10 m 10 m 10 m 30 m 5

6 CONNECTION The AMF Soundmosaic can be connected to any standard amplifier (see below); generally up to four modules per amplifier. Should this be insufficient for the desired application, a greater number can be connected through a combination of individual amplifiers. It is important to ensure that the total resistance of elements connected in one channel matches the total resistance of each of the other channels. R R Speakers B A L L Overall, the resistance should not be less than 4Ω and should not exceed. Option 1: one element with per channel Note: It is important that all connections (channels) are operated with the same Ohm value (resistance). By standard, every element features one connection lead. The extension of this lead as well as the connection to the amplifier needs to be done with suitable audio cables (respecting the necessary conduit crosssectional area). These cables are not included in the scope of delivery. Option 2: 4Ω EMERGENCY ANNOUNCEMENTS The AMF Soundmosaic can be operated with up to 80 watts for short emergency announcements and signal tones without damaging the system. Option 3: Option 4: 16Ω AMPLIFIER / RECEIVER Due to the operation of Soundmosaic, it requires slightly more power than conventional conical loudspeakers. We recommend 20 W of output per channel for continuous operation of the system. The output of a single AMF Soundmosaic can be assumed as 20 W (RMS). RMS output: Root Mean Square output is used as a measure for the comparison of output of loudspeakers and amplifiers with regard to their performance in replaying music with a defined test signal similar to music. Important information: With a permanent signal of more than 30 W the temperature protection inside the module is activated, protecting it from damage. Brief emergency announcements / signal tones can, however, be fed in with considerably more power. Thus, for example, a signal of 50 watts causes an emitted sound source volume of 85 db. 6

7 AVAILABLE SURFACE PATTERNS The AMF Soundmosaic is available in all classic AMF designs: THERMATEX plain surfaces: Plain, Fine Stratos and Laguna; Fleecelaminated surfaces (tile thickness: 19 mm) e.g.: THERMATEX Acoustic THERMATEX textured and microperforated surfaces: Fine Stratos micro perforated, Laguna micro perforated, Star and Pinhole THERMATEX fissured surfaces: Mercure, Fine FreskoSaturn and Fresko SIZES Dimensions: Edge details: Thickness: SCOPE OF DELIVERY 600 x 600 mm and 625 x 625 mm SK, VT (as per availability) 15 mm (19 mm for fleecelaminated surfaces) When ordering AMF Soundmosaic the individual components required for on site installation are supplied. TECHNICAL SPECIFICATIONS Sinus: 20 W Maximum load (music): 40 W (20 W RMS) Impedance: Frequency range: ,000 Hz* Volume depreciation: see image on page 5 Sensitivity: 71dB/Wm** Size: 140 x 140 mm Height: 24 mm Weight: 270g Temperature range: 0 40 Celsius Relative humidity: 5 95 %, no condensation Power of amplifier: 20 W per channel * limited frequency range via highpass filter ** this measurement for conical loudspeakers does not accurately reflect the actual distribution of sound levels of flatpanel loudspeakers. Using this value in customary planning tools the sound emission by the AMF Soundmosaic cannot be correctly compared. THERMATEX tile with wave converter: The wave converter is directly connected onto the reverse of the desired surface pattern tile and safely packed. Holddown Clips: The required clips for the correct assembly and the sound transmission to adjoining tiles are supplied in sufficient quantity (24 in total). Lead extensions and the amplifier are not included. 7

8 SOUND, LIGHT & ETECH NEW CEILING TECHNOLOGY BEAMEX SYSTEM Electrically operated and remote controlled ceiling panel integrating projectors within the ceiling. LED Ceiling Light affects our wellbeing and ability to concentrate. Light sources are significant elements in the interior design process. The Cristallo tile stylishly integrates lighting into the suspended ceiling. LIGHTS Ceiling fittings with fire protection for all requirements SOUNDMOSAIC Integrated flatpanel loudspeaker working on the principle of wave conversion with HiFiQuality and (vertically) close to 180 sound emission. Knauf AMF GmbH & Co. KG Elsenthal 15 D94481 Grafenau Germany Tel.: 49 (0) / Fax: 49 (0) / info@amfgrafenau.de Für abgehängte Decken wurde die Bauproduktenrichtlinie The main criteria for the CE marking of ceiling products and ceilings 89/106/EWG mit der Europäischen Norm EN umgesetzt. systems are the Construction Products Directive 89/106/EEC and Diese legt die wesentlichen Kriterien des CE Kennzeichens für European Standard EN Deckenprodukte und Deckensysteme fest. Das Knauf RALGütezeichen AMF GmbH & Co. stellt KG is die certified gleichbleibend in accordance hohe Qualität with Quality der Assurance AMFMineralwolle Standard to sowie ISO 9001 deren and Biolöslichkeit ISO sicher. The RAL Seal ensures the constant high quality of AMF mineral wool fibres as well as the biosolubility.