Abstract
In this paper a new secondary method for measuring the response curve of a microphone is proposed. It is based upon the linear anamorphical relationship that exists between the instantaneous levels of signals picked up by two microphones when they are placed in the same wave front. The main theoretical bases are presented along with experimental results for free and semi-reverberant fields for different kinds of test signals, including frequency swept signals. Accuracy under these conditions is analyzed and experimental procedures for maximizing it are proposed. When used in semi-reverberant fields and with continuous frequency sweep, this method has among its outstanding characteristics a great rapidity and reasonable precision. These features make the method very useful in the quality control of serial microphones in factories or laboratories in which anechoic chambers are not available.
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