INDEX 



Absorption coefficient, 275, 279 

 Acoustical, analogies, 49 

 capacitance, 52, 79 

 elements, 59, 77 

 impedance, 59, 271 

 bridge, 271 

 narrow slit, 78 

 small tube, 78 

 inertance, 51 

 ohm, 59 

 reactance, 59 

 resistance, 50, 59, 77 



table, 8 

 system, one degree of freedom, 54 

 three degrees of freedom, 61 

 two degrees of freedom, 60 

 wave equation, 4, 7 

 Actuator, 248 

 Adiabatic, 5 

 Air chamber, 150 



Amplitude of, musical instruments, 328 

 orchestras, 328 

 speech, 328 

 plane wave, 9 

 Analogies, acoustical, 49 

 electrical, 49 

 mechanical, 49 

 table, 76 

 Architectural acoustics, 278 

 Articulation measurements, 277 

 Artificial, ear, 270 

 mastoid, 271 

 voice, 271 

 Attenuation of sound in air, 300 

 Audiometry, 276 

 Auditory, localization, 325 

 perspective, 311 



Baffles, loud speaker, 127 



microphone, 194 

 Bars, longitudinal vibration, 44 



torsional vibration, 46 



337 



transverse vibration, 38 

 clamped, 

 clamped, 40 

 free, 38 

 free free, 39 

 supported, 40 

 Batteryless telephone, 213 

 Beats, 325 

 Bel, 15 



Binaural reproduction, 310 

 Bipolar telephone receiver, 226 

 Broadcasting, of sound, 314 

 studios, 307 

 system, 314 



Cabinet, back enclosed, 130 



reproducers, 129 

 Calibration of microphones, 245 

 directional characteristic, 250 

 electrical impedance characteristic, 253 

 nonhnear distortion characteristic, 251 

 phase distortion characteristic, 252 

 response frequency characteristic, 245 

 pressure response, 245 

 electrostatic actuator, 248 

 pistonphone, 246 

 thermophone, 247 

 field response, 249 

 Rayleigh disk, 249 

 transient response characteristic, 253 

 Carbon microphone, 172 

 double button, 175 

 single button, 172 

 Cathode ray tube, for measurement of, 

 directional characteristic, 250 

 nonlinear characteristic, 264 

 phase characteristic, 252 

 response characteristic, 257 

 transient characteristic, 268 

 Cellular horn, 32, 167 

 Circular, clamped plate, 42 

 membrane, 40 



