Room Acoustics DHC 161 March 2, 2011. Early sound in a room.

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Presentation transcript:

Room Acoustics DHC 161 March 2, 2011

Early sound in a room

concert hall design Boston Symphony Hall Concertgebouw Amsterdam Istanbul, Turkey Radio Concert Hall, Denmark

reverberation chamber anechoic chamber Special Rooms

Standing waves Chladni plate patterns

Practice calculation 3.2 m 12.5 m speed of sound is 342 m/s horizontal modes vertical modes fundamental we know that boundaries are fixed-fixed standing waves in a room 2 nd harmonic 3 rd harmonic 106 Hz 159 Hz 212 Hz 4 th harmonic 27.4 Hz 41.1 Hz 54.8 Hz n th harmonic n*53.4 n*13.7 These frequencies will be amplified by the room