Presentation on theme: "Acoustics of Concert Halls and Rooms SOME BASICS OF ARCHITECTURAL ACOUSTICS Auditorium Acoustics Science of Sound, Chapter 23 Principles of Vibration and."— Presentation transcript:
Acoustics of Concert Halls and Rooms SOME BASICS OF ARCHITECTURAL ACOUSTICS Auditorium Acoustics Science of Sound, Chapter 23 Principles of Vibration and Sound, Chapter 11 Kimmel Center
Free field Reflections p vs r log p vs log r SOUND FIELD
Sound decay Sound decay in a 400 m 3 classroom Sound pressure level as a function of time for that room
GROWTH AND DECAY OF REVERBERANT SOUND RT = K (volume / area) RT = 0.161 V/A (V in m 3 ; A in m 2 ) If room dimensions are given in feet, the formula may be written: RT= 0.049 V/A (V in ft. 3 ; A in ft. 2 )
Decay of reverberant sound (a)and (b) are decay curves of sound pressure and sound level in a room with uniform energy distribution (c) shows different initial and final reverberation times (d) shows peaks due to prominent standing waves or room resonances
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