Prevailing noise conditions should not exceed 45 dB on 'A' scale.
Wind velocities naturally experienced at site should not exceed 16 km/h.
Back stage wall should be made reflective and broken into convex shaped surface
Overall shape should be flat in plan; however, if it is desired to be concave, it should be broken into convex surfaces which in either case should be of at least 90 to180cm width.
When is it necessary to treat back stage wall acoustically?
When the depth of stage exceeds 6m
In case the audience exceeds 600 or background noise is more than 45 to 50 dB. The loudspeaker system should be so designed that it is capable of providing an average level of up to 80 dB over the entire listening area.
Where does optimum clarity of speech depend?
CORRECT REVERBERATION TIME, ABSENCE OF ECHO, CORRECT LOUDNESS LEVEL AT ALL PARTS OF THE HALL AND LOW BACKGROUND NOISE
