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channels in multiples
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air load air pressure amplifiers amplitude angle appear Arthur Winograd audial audio band binaural reproduction binaural sound systems broadcasting cardioid cartridge cochlea coil components cone controls Courtesy curve diaphragm directional characteristics disc records distance distortion ears electrical electronic music elements employed enclosure equipment film front fundamental frequency Hi-Fi Hi-Fi bugs high-frequency horn human hearing increase instruments intensity differences intensity-difference listening room loudness loudspeaker enclosures loudspeakers low frequencies low-frequency magnetic manufacturers ment micro modulated monaural monophonic monophonic recording move movement multiplex notation orchestra output overtones phonic piezoelectric playback polar pattern position preamplifiers pressure variations produce pure tone quency radiation radio response result separate signal single sound reproduction sound source source of sound spaced microphones SPEAKER SYSTEM stereo channels stereo effect stereo recording stereophonic recording stereophonic reproduction stereophonic sound stylus tape recording techniques theater tions tracks transmission transmitted types usually vertical vibrating