Research on Numerical Implementation and Errors Analysis of Cylindrical Broadband Acoustic Holography

Abstract

Broadband acoustic holography based on intensity measurement (BAHIM) is a new technique which is developed for the reconstruction of sources using near-field acoustic holography (NAH). With the sound intensity distribution on a measurement surface, the complex sound pressure phase on the measurement cylinder can be obtained and the complex sound pressure predicted. Appling this method to identify the noise source in underwater cylindrical objects, the principle of the cylindrical interior BAHIM and numerical implementation are presented. In addition, the numerical simulations have been conducted. The influences of the change of parameters are discussed in detail. The merits of the underwater cylindrical interior BAHIM in the reconstruction of sound field, identification and localization of the noise sources are shown clearly in the results.