Acoustical intensity, 51(97), 315(22), 509(60, 63)
Acoustics, 186(78)
Doppler effect, 336(74)
Loudness of siren, 319(45)
Loudness sensed by human ear, 332(64), 394(56), 398(35)
Sound of jet engine, 124(58), 620(120)
Sound reflection in buildings, 593(51)
Velocity of sound, 16(49), 29(49), 158(60), 163(56), 177(96), 577(53), 646()
Ultrasonics, 619(109)
Wavelength of sound, 653(50)