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Behavior of Sound in a Room
13 other sections not shown
absorbing material absorption coefficient Acous acoustic conditions acoustic correction acoustical treatment air space Amer amplifying approximately Architectural Acoustics arrangement ARTICULATION TESTS audi audience auditorium average balcony buildings Calculate ceiling cent CHAPTER Chautauqua Auditorium curved walls cycles per second cycles/sec decibels Diagram showing diffraction direct sound distribution of sound disturbance echoes effect equation example Eyring equation Figure floor frequency give hairfelt hear installation intensity level Jour Knudsen listening loud-speaker loudness machine mean free path objectionable optimal partition Philadelphia Orchestra phons plaster Potwin problem quiet rarefactions rear walls reduced reduction factor reflected sound reflection of sound resonant reverberation rock wool sabins shown in Fig side walls sound insulation sound level sound reflected sound waves sound-absorbing materials sound-amplifying system soundproof speaker speech stage standing waves Table tion tone torium transmission tuning fork usually velocity of sound ventilation vibrations volume wood