Impulse-based reciprocal measurement of the transfer functions of underwater structure

• Main Authors: Guo Cheng, Li-lin Cui, Zhi-qiang Lv
• Format: Article
• Language: English
• Published: JVE International 2016-09-01
• Series: Journal of Vibroengineering
• Subjects: transfer function; reciprocity principle; impulse source; reverberant field; underwater measurement
• Online Access: https://www.jvejournals.com/article/16957
• ISSN: 1392-8716; 2538-8460

An impulse-based reciprocal method is proposed for measuring the transfer functions of underwater structure. This method uses an impulse sound source, and the volume velocity of source is derived from the detected sound pressure. The influences of the reverberant sound field on the detected sound pressure are eliminated by an operation with time gates. Numerical simulation verifies that this impulses-based reciprocal measurement can obtain results with accuracy similar to the traditional reciprocal measurement method using electromagnetic source. Because much less time is required in the impulse-based measurement, the time efficiency is boosted. This method is also validated in a lake experiment, and the experimental result shows that the influences of the reverberant field on the derived volume velocity are eliminated.