11 pages matching frequency modulation in this book
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acoustic air gap amplitude Audio Engineering Society audio frequency audio frequency range audio signal channels compliance cone depicted in Fig diaphragm direct radiator dynamic direct sound directional characteristics directivity pattern disk phonograph record disk record drive earphone electrical circuit electrical impedance electrical resistance elements Equation film filter FREQUENCY IN HERTZ frequency modulation frequency response characteristic groove Harry F hertz horn loudspeaker input loudness magnetic head magnetic tape recorder magnetic tape reproducer magnetic tracks mass and mechanical mechanical impedance mechanical network mechanical resistance monitoring room monophonic noise level nonlinear distortion obtained quadraphonic radiator dynamic loudspeaker ratio recording and reproducing reflected sound reproduced sound reproducing system resonant frequency reverberation ribbon SECTIONAL VIEW shown in Fig sound energy density sound level sound motion picture sound pressure sound reproduction sound source sound wave sound-reenforcement system sound-reproducing system stereophonic sound studio stylus transducer transistor unidirectional microphone voice coil volume control wavelength