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How We Hear
Sources of Sound
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absorbent absorption co-efficient acoustic air column amplitude angle anti-node basilar membrane bass brass instruments broadcasting cardioid Chapter cochlea condenser microphones dB relative decibels depends diaphragm difference directivity pattern displacement distance effect example face FIGURE floor frequency range frequency response fundamental gives harmonics hearing Helmholtz resonator high frequencies impedance increase instruments insulation intensity layer listener loudness loudspeaker low frequencies maximum membrane ment method micro mineral wool modes monaural moving coil noise obtained obviously octave ohms omni-directional orchestra output overtones path length phase phons piano pipe pitch plate porous material pressure gradient produce quency radiated ratio reduced reflected sound reproduction resonant frequency rest position reverberation ribbon microphone room resonances sensitivity shows sound energy sound reduction factor sound wave source of sound speaker speech standing wave stereo stereophonic string studio surface tone tube types unit V/dyne/sq varies vibrate voltage wall wavelength