Sound in its simplest form is a vibration, a wave that is transmitted through a media. In an area specifically constructed for sound, such as theaters or concert halls, it is significant to consider every aspect of how sound is reflected and absorbed, as well as the directions of acoustic transmission. The endurance of sound in an area and its remnants or echoes from the original source is referred to as reverberation.
Reverberation times, the amount of time it takes for the sound to completely dissolve, is a crucial factor in designing architecture acoustics, as the area must achieve a certain reverberation time in order to result in the best display of sound. Reverberation time must be perfectly controlled within spaces, as too much of it could result in excessive echoes and a difficult deciphering of sound, while too little of it would not be able to reach all corners of the space. Through surfaces that adequately reflect and absorb sound, the optimal reverberation time can be created.
The interior walls of an area should be angled for direct and controlled reflection of sound. For sound to reach rear corners of the space, the reflectivity and direction of the interior walls should be carefully considered. The materials in which interior walls are made of are important as well. Fabric or perforated metals are capable of absorbing sound, and the panels that construct the interior wall should have finishes that will not interfere with the absorption such as wood, fabric, or acoustical tiles.
Frank Gehry's Walt Disney Concert Hall is a unique design of a concert hall where the or hear and the audience are seated in the same space. The overall architectural elements of the hall such as the partitions and the curved ceilings are all thoroughly involved in an intricate acoustical system.
http://www.archdaily.com/441358/ad-classics-walt-disney-concert-hall-frank-gehry/
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