12th International Congress on Acoustics, Toronto, Canada, 24-31 July 1986: ProceedingsTechnical Program Committee by the Executive Committee of the 12th International Congress on Acoustics, 1986 - Architectural acoustics |
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... angle ( degrees ) 04 025 0 90 85 80 75 wall angle ( degrees ) 70 65 Fig . 3. Intelligibility as a function of wall angle . Further conditions as specified in Fig . 1 . The sensitivity of STI for non - ideal conditions of the depicted ...
... angle ( degrees ) 04 025 0 90 85 80 75 wall angle ( degrees ) 70 65 Fig . 3. Intelligibility as a function of wall angle . Further conditions as specified in Fig . 1 . The sensitivity of STI for non - ideal conditions of the depicted ...
Page 6
... angle of inci- dence but also its horizontal angle . The dependence of the absorptivity on the incident angle is shown in Fig . 2 with the parameter of normalized wavenumber defined by k = kL . Figure 2 ( a ) , in which is kept con ...
... angle of inci- dence but also its horizontal angle . The dependence of the absorptivity on the incident angle is shown in Fig . 2 with the parameter of normalized wavenumber defined by k = kL . Figure 2 ( a ) , in which is kept con ...
Page 3
... angle , i the incidence angle , co the ultrasonic velocity of the fluid and c the ultrasonic velocity of the specimen . The theory of refraction is expressed as follows : sin ( t ) C sin ( i ) = ( 2 ) Co When the specimen is not ...
... angle , i the incidence angle , co the ultrasonic velocity of the fluid and c the ultrasonic velocity of the specimen . The theory of refraction is expressed as follows : sin ( t ) C sin ( i ) = ( 2 ) Co When the specimen is not ...
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absorption coefficient acoustic intensity acoustique Acustica amplitude angle applied attenuation attenuation constant beam boundary calculated components concert halls configuration constant correlation coupling curve d'une dB(A density diffusion displacement distance distribution effect elastic energy equation estimated evaluation excitation experimental factor Figure filter frequency impulse response incidence input intensity linear loudspeaker matrix measured method méthode microphone modal mode modulation Modulation Transfer Function noise normal obtained octave band output panel parameters phase phonon plane plate predicted propagation pulse radiation RASTI ratio reflection resonance reverberation room acoustics seats signal simulation sound field sound insulation sound level sound pressure sound pressure level sound reinforcement system sound source sound transmission spatial spectrum speech intelligibility Speech Transmission Index structure surface technique temperature tion transducer ultrasonic ultrasound values vector velocity vibration wall wave