A computer controlled system for measuring small signal parameters of loudspeakers will be presented. The system uses a signal generator, voltmeter, phasemeter, and ohmmeter to measure the free air resonance frequency and Q. The loudspeaker is placed on a box and the measurements are automatically repeated. These measurements, in conjunction with a voice coil resistance measurement, give all of the information needed for calculation of the loudspeaker parameters. The program calculates and prints the values. A flowchart and a listing of the BASIC language program are given. Examples of the measurements will be presented.

Author: Cabot, Richard C.
Affiliation: Audio Precision, Beaverton, OR
AES Convention: 81 (November 1986) Paper Number: 2402
Publication Date: November 1, 1986
Subject: Audio Reproduction, Transducers, and Sound Reinforcement: Modeling

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