Simple Estimation of Sound Source Directivity in Diffused Acoustic Field: Numerical Simulation

• Main Author: Kookhyun Kim
• Format: Article
• Language: English
• Published: The Korean Society of Ocean Engineers 2019-10-01
• Series: 한국해양공학회지
• Subjects: underwater sound source; sound source directivity; simple estimation technique; diffused acoustic field; reverberant tank plot
• Online Access: http://joet.org/upload/pdf/joet-33-5-421.pdf

The directivity of an underwater sound source should be measured in an acoustically open field such as a calm sea or lake, or an anechoic water tank facility. However, technical difficulties arise when practically implementing this in open fields. Signal processing-based techniques such as a sound intensity method and near-field acoustic holography have been adopted to overcome the problem, but these are inefficient in terms of acquisition and maintenance costs. This study established a simple directivity estimation technique with data acquisition, filtering, and analysis tools. A numerical simulation based on an acoustic radiosity method showed that the technique is practicable for sound source directivity estimation in a diffused reverberant acoustic field like a reverberant water tank.