Calibration of a cardioid microphone for improving accuracy of normal impedance measurement in a tube
This paper presents a method for obtaining the complex amplitudes of both the sound pressure and the particle velocity of a cardioid microphone. These values are used as calibration values in a new technique for measuring the impedance of materials using a combination of two cardioid
microphones placed in a tube. The previous technique, which utilized a single cardioid microphone placed in a tube, required two separate measurements to be taken - one with the microphone facing the specimen and one with the microphone facing away. This new method provides a more efficient
approach to impedance measurement.
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Document Type: Research Article
Affiliations: Department of Architecture and Living Design, Junior College, Nihon University
Publication date: 30 November 2023
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