Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
권호 표지
DOI QR코드

DOI QR Code

Acoustical characteristics of prototype mechanical white noise generator as an underwater sound source

시험 제작한 기계식 백색소음기 수중음원의 음향적 특성

  • Shin, Hyeon-Ok (Division of Marine Production System Management, Pukyong National University)
  • 신현옥 (부경대학교 해양생산시스템관리학부)
  • Received : 2014.06.10
  • Accepted : 2014.08.13
  • Published : 2014.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper describes a prototype mechanical white noise generator has a source level of more than 170.0 dB (re $1{\mu}Pa$ at 1 m) at the frequency range of 10 Hz to 100 kHz. The results of performance evaluation of the generator are as follows. The average source level of the generator measured by a step of $15^{\circ}$ in horizontal (0 to $360^{\circ}$, 25 points) was 185.2 (SD (standard deviation): 2.3) dB (re $1{\mu}Pa$ at 1 m). The maximum and minimum source levels were appeared at the frequency range of 2.5 to 5.0 kHz and around 100 kHz, respectively. The average source levels at $0^{\circ}$, $90^{\circ}$, $180^{\circ}$ and $270^{\circ}$ were 162.9 (SD: 10.6), 168.4 (SD: 10.0), 162.1 (SD: 9.1) and 166.5 (SD: 11.1) dB (re $1{\mu}Pa$ at 1 m). The average source level measured by a step of $30^{\circ}$ in vertical was 184.9 (SD: 2.2) dB (re $1{\mu}Pa$ at 1 m). The relative maximum variation width of the source levels in horizontal and in vertical measurement were less than 7.0 dB and 1.0 dB, respectively.

Keywords

References

  1. Buogo S and Cannelli GB. 2002. Implosion of an underwater spark-generated bubble and acoustic energy evaluation using the Rayleigh model. J Acoust Soc Am 111, 2594-2600. https://doi.org/10.1121/1.1476919
  2. Chang JH and Chang JW. 1985. ARC discharge sound source in underwater. J Kor Soc Fish Technol 21, 12-18.
  3. Chang JW, Park JMand LeeWH. 1988. Long range active acoustic system for fish finding. J Kor Soc Fish Technol 24, 292-300.
  4. Chang JW, Yang JW and Kim DH. 1993. Ultrasound imaging improvement using higher harmonics of impulse sound. J Kor Soc Fish Technol 29, 1-6.
  5. Francois RE and Garrison F. 1982. Sound absorption based on ocean measurements. Part II: Boric acid contribution and equation for total absorption. J Acoust Soc Am 72, 1879-1890. https://doi.org/10.1121/1.388673
  6. Galkin OP, Popov RY and Tuzhilkin YI. 2007. Vertical variability of sound fields produced by underwater explosions at difference distances from the source. Acoust Phys 54, 823-829. (doi:10.1134/s1063771008060110)
  7. Lee WH and Chang JW. 1987. Application of parametric acoustic source to fish finding. J Kor Soc Fish Technol 23, 189-197.
  8. Sun YH, Zhou YX, Jin MJ, Liu Q and Yan P. 2005. New prototype of underwater sound source based on the pulsed corona discharge. J Electrostatics 63, 969-975. (doi:10.1016/ j.elstat.2005.03.070)
  9. Yang Y, KimH, Starikovskiy A, Cho Y and Fridman A. 2011. Mechanism of calcium ion precipitation from hard water using pulsed spark discharges. Plasma Chem Plasma Process 31, 51-66. https://doi.org/10.1007/s11090-010-9269-9