Dear fellow MARMAM-ers, to those of you studying underwater noise impacts on marine mammals, a new article describing underwater noise of small personal watercraft (jetskis) has just been published online in the Journal of the Acoustical Society of America. A pdf can be downloaded FOR FREE from:
URL: http://link.aip.org/link/?JAS/133/EL326 DOI: 10.1121/1.4795220 Erbe, C. (2013) “Underwater noise of small personal watercraft (jet skis)”, Journal of the Acoustical Society of America 133(4): EL326-EL330. Personal watercraft (water scooters, jet skis) were recorded under water in Bramble Bay, Queensland, Australia. Underwater noise emissions consisted of broadband energy between 100Hz and 10kHz due to the vibrating bubble cloud generated by the jet stream, overlain with frequency-modulated tonals corresponding to impeller blade rates and harmonics. Broadband monopole source levels were 149, 137, and 122dB re 1uPa @ 1m (5th, 50th, and 95th percentiles). Even though these are lower than those of small propeller-driven boats, it is not necessarily the broadband source level that correlates with the bioacoustic impact on marine fauna. Cheers, Christine Christine Erbe Centre for Marine Science and Technology Curtin University, Perth GPO Box U1987, Western Australia 6845 Tel.: +61 8 9266 7543 Email: c.e...@curtin.edu.au Web: http://cmst.curtin.edu.au
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