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Action op Sound with Applications to Buildings
Behavior op Sound Waves in a Room
Reverberation in an Auditorium and its Control
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absorbing material Acousti-Celotex acoustic correction acoustic data acoustic design action of sound air space amount arc-light architects Architectural Acoustics audi auditor auditorium balcony building structure carpets ceiling coefficients of absorption Concert Hall considerable construction cube root cubic feet decibels doors ducts echoes elevator experiments F. R. Watson factor felt floor give glass Gypsum hairfelt Harvey Fletcher inch incident sound installed insulation intensity of sound layer loudness one-third audience optimum P. E. Sabine padded parabolic reflector partition piano pipe organ pitch Plaster porous practice rooms present rarefactions reduce reflected sound resonance reverberation shows Smith Music Building sound transmitted sound waves sounding boards soundproofing source of sound speaker speech studios surface theater thick tile torium transfer of sound transmission of sound units University of Illinois Upholstered seats ventilation system vibrations volume Wallace Clement Sabine Wallace Waterfall wave length wood