A STUDY ON TWO-MICROPHONE INTENSITY MEASUREMENT SYSTEM ERROR MODEL AND ITS CORRECTING METHOD

摘要

In this paper the causes of two-microphone intensity measurement system error are verified theoretically; the error caused by residual intensitymethod correcting intensity measurement system error is analyzed theoretically. The result of the corrected error by computer simulation shows: the phase mismatch error exists in any intensity measurement system, it can be corrected by residual intensity method, however, residual intensity method correction is partial, and in the case of harmonic sound field, the error is also periodical.