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Time-domain measurement of loudspeaker driver parameters

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3 Author(s)
Leach, W.M., Jr. ; Georgia Institute of Technology, Atlanta, GA, USA ; Schafer, R.W. ; Barnwell, T.P., III

A new method for the measurement of the Thiele-Small small-signal parameters of a moving-coil electromagnetic transducer driver is described. The technique is based on a time-domain analysis of the transient response of the loudspeaker voice-coil circuit to a current step of excitation. By sampling the damped sinusoidal transient generated by such an excitation, the loudspeaker parameters can be calculated from a linear predictive analysis of the recorded data. The technique has been implemented with a digital computer and measurement examples are presented. The method is simple and can be implemented with a microprocessor configuration for rapid assembly line testing.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:27 ,  Issue: 6 )