By a News Reporter-Staff News Editor at Journal of Technology -- A new study on Vibration and Acoustics is now available. According to news reporting originating in Singapore, Singapore, by VerticalNews journalists, research stated, "A pressure compensated metal diaphragm based fiber laser hydrophone configuration that can provide good sensitivity, large bandwidth, and sea state zero noise floor is proposed in this paper. A simplified theoretical model of the proposed sensor configuration is developed in which the acoustic elements of the sensor configuration are modeled using a four-pole acoustic transfer matrix and the structural elements are modeled as second order single degree of freedom elements."
The news reporters obtained a quote from the research from Singapore National University, "This model is then used to optimize the design parameters of the sensor system to achieve the performance objectives. An axisymmetric finite element analysis of the sensor configuration is also carried out to validate the results from the simplified theoretical model. Prototype sensors were fabricated and hydrostatic testing in a pressure vessel validated the static pressure compensation performance of the sensor. Frequency dependent sensitivity of the sensor system was measured through acoustic testing in a water tank. The prototype sensor gave a flat frequency response up to 5 kHz and experimental results compared well with theoretical predictions."
According to the news reporters, the research concluded: "The sensor has an acceleration rejection figure on the order of 0 dB ref 1 m/s(2) Pa and the pressure compensation approach worked reasonably well up to a hydrostatic pressures equivalent to a depth of 50 m."
For more information on this research see: Pressure compensated fiber laser hydrophone: Modeling and experimentation. Journal of the Acoustical Society of America, 2013;134(4):2710-2718. Journal of the Acoustical Society of America can be contacted at: Acoustical Soc Amer Amer Inst Physics, Ste 1 No 1, 2 Huntington Quadrangle, Melville, NY 11747-4502, USA. (Acoustical Society of America - acousticalsociety.org/; Journal of the Acoustical Society of America - asadl.org/jasa/)
Our news correspondents report that additional information may be obtained by contacting U.K. Chandrika, Singapore National University, Dept. of Mech Engn, Singapore 117576, Singapore. Additional authors for this research include V. Pallayil, K.M. Lim and C.H. Chew.
Keywords for this news article include: Asia, Vibration and Acoustics
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