NASA NTRS · 19720000059
Improved Audio Reproduction System
Abstract
Circuitry utilizing electrical feedback of instantaneous speaker coil velocity compensates for loudspeaker resonance, transient peaks and frequency drop-off so that sounds of widely varying frequencies and amplitudes can be reproduced accurately from high fidelity recordings of any variety.
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Chang, C. S.. 1972-01-01. Improved Audio Reproduction System. https://ntrs.nasa.gov/citations/19720000059
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