Method of free-field broadband calibration of hydrophone sensitivity based on pink noise
US11391863B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 29, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Jan 21, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/324
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of free-field broadband calibration of hydrophone sensitivity based on pink noise, relating to the field of free-field underwater acoustic measurement, and is mainly used for broadband measurements of hydrophone sensitivity in free-field. The method of the present disclosure is to transmit a broadband pink noise signal by controlling the signal source, and to perform the synchronous processing and FFT to the transmitted current signal and the received voltage signal, such as interception and zero padding, and finally obtain the transfer function in the frequency domain; by analyzing the direct wave and the reflected wave in the water tank, the transfer function is averaged by a rectangular window to eliminate the influence of the reverberation of the reflected wave in the water tank, so as to obtain the broadband transfer function of the free-field between the transmitting transducer and the hydrophone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.