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Introduction and Terminology
Disturbance of Plane Sound Waves by Obstacles and by Finite Baffles
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Acous acoustic impedance Amer amplifier amplitude analyzer anechoic chamber articulation score attenuation audiometer average band bandwidth calibration carbon microphone cavity centimeters chamber Chapter circuit components condenser microphone constant coupler crystal cycles per second decibels determined diaphragm disk distortion dyne/cm2 earphone effect electrical impedance equal equation factor filter filter band free-field Frequency in cycles frequency range frequency response function of frequency given graph harmonic input instrument Jour Laboratory linear loudness loudspeaker maximum measured method micro normal obtained oscillator output peak percent phase plane plotted produced pure tones quency random noise ratio reading rectifier resistance resistor resonance response curves reverberation sample shown in Fig signal sine waves sound field sound level meter sound pressure level sound wave spectrum level speech standard talkers temperature threshold tion transducer vacuum tube variable vibration