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Introduction and Terminology
Disturbance of Plane Sound Waves by Obstacles and by Finite Baffles
Primary Techniques for the Measurement of Sound Pres sure and Particle Velocity and for the Absolute Calibra tion of Microphones
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1000 Frequency 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 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 open-circuit oscillator output peak percent phase plotted produced pure tones quency random noise ratio reading rectifier resistance resistor resonance reverberation sample shown in Fig signal sine waves sound field sound level meter sound pressure level sound wave specific spectrum level speech standard talker temperature threshold tion transducer vacuum tube variable vibration voltage