22mar1:00 pm2:00 pmA noise avoidance behavior model for migrating whalesJohn R. Buck & Peter L. Tyack1:00 pm - 2:00 pm Lecture Theatre D, Bute Building Speaker organisation: UMass Dartmouth (JRB) & Univ. of St Andrews (PLT)
This talk presents a noise avoidance model for migrating gray whales. The model assumes each individual animal has a maximum exposure threshold which it will tolerate, which we call its
This talk presents a noise avoidance model for migrating gray whales. The model assumes each individual animal has a maximum exposure threshold which it will tolerate, which we call its avoidance threshold. The model assumes that as animals approach a consistent noise source, they will adjust their course as little as possible to insure that their individual sound exposure, or received level, will not exceed its avoidance threshold. The model estimates the probability mass function (PMF) of the avoidance threshold for a population by comparing the histograms of the closest point of approach (CPA) to the source between playback and control conditions. Repeating the analysis using bootstrap resampling techniques on the CPA data provides an interval estimate of the avoidance threshold PMF at each received level. The avoidance index PMF was estimated for gray whales from CPA data observed during exposure to a single U.S. Navy SURTASS-LFA source in 1998. The median avoidance threshold for this population was estimated to be 134 /- 3 dB re 1 uPa, with 90% confidence.
[Work supported by US Office of Naval Research]
Dr. John Buck received his Ph.D. from the MIT/WHOI Joint Program in Oceanographic and Electrical Engineering in 1996. He joined the faculty of UMass Dartmouth later that year, and is presently a Professor in the ECE Dept. His honors include the University of Massachusetts Manning Prize for Excellence in Teaching (2016), the IEEE Education Society’s Mac Van Valkenburg Early Career Teaching Award (2005), the UMass Dartmouth Faculty Federation Leo M. Sullivan Teacher of the Year Award (2008), an ONR Young Investigator Award (2000) and an NSF CAREER award (1998). He is a Fellow of the Acoustical Society of America. His research interests include signal processing, underwater acoustics, animal bioacoustics and engineering pedagogy.
(Thursday) 1:00 pm - 2:00 pm
Lecture Theatre D, Bute Building
UMass Dartmouth (JRB) & Univ. of St Andrews (PLT)
Prof. Peter L. Tyackplt@st-andrews.ac.uk