Acoustic requirement for good auditorium is as follows-
1) The initial sound should be of adequate intensity.
2) The sound should be evenly distributed throughout the hall.
3) The successive nodes should be clear & distinct.
4) Noise has to be taken care of.
5) The size & the shape of the ball has also to be taken care.
These requirements can be achieved by following ways-
1) Site/location:-Before construction the first important factor to be considered is the location. For best acoustical quality of the hall. It should be far from railway tracks, industrial areas, airports, & highways, etc.
2) Size: - The size of the hall should be optimum, neither big nor small. It is small uneven distribution of sound will take place due to the formations of stationary waves. If size is too big reverberation time will be more that results in confusion &unpleasant sound.
3) Shape: - Instead of parallel walls spade walls are preferred, curved surfaces should be built with proper care.
4) Reverberation: - Reverberation time (T) should be neither too small nor too large. If it is small intensity will be weak. If large sound will be unpleasant. Thick carpets curtains, upholstered chairs, audience take care of reverberation. For lecture halls the reverberation time is approximately 0.5sec, for music concerts hall-1.5sec, for cinema theatres-2sec
5) Absorption: - Use of proper absorbent material enhances the quality of sound.
6) Echelon effect: - The regular intervals/space between staircase or railings give repeated echo, this makes the sound unpleasant, so thick carpets take care of this & wide gaps between staircases are generally preferred.
and 5 others joined a min ago.
teamques10
★ 68k