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The Nature of Sound
The First Step
The Direction Problem
10 other sections not shown
achieve acoustic feedback amplifier amplifying devices amplitude amplitude modulation audio frequencies audio signal base basic beta bias binaural capacitance capacitor carrier cathode channel characteristic characteristic impedance circuit of Fig coil collector current collector voltage components conductor connected curves diaphragm diode direction disc dissipation distortion dynamic range earpiece effect electrical electrons emitter frequency modulation frequency response gain grid groove hear high frequency higher impedance inductance input left and right limit listening load loudspeaker low frequencies magnetic maximum means microphone modulation multiplex needed ohms output peak pedance percent phase pickup plate current plate voltage playback playing problem produce push-pull output quadraphonic radio record changer recording reproduced resistance resistor result reverberation screen grid sidebands sound waves stage stereo stylus supply swing tape track transducer transformer transistor transmission triode tube variation vibrations voltage and current volts waveform zero