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Optical Measurement of Loudspeaker Driver Large Signal Displacement

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An optical technique for measurement of the peak-to-peak large signal displacement of a loudspeaker driver cone under dynamic operating conditions is presented. The method allows the identification and measurement of shifts in the cone zero center position as functions of drive level and frequency.

JAES Volume 26 Issue 3 pp. 145-148; March 1978
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AES - Audio Engineering Society