01960nas a2200181   4500008004100000022001400041245015000055210006900205260001600274300001600290490000800306520132700314100002001641700002401661700001801685700002401703856005101727       2018                        eng d  a0001-496600aDependence of bottlenose dolphin (<i>Tursiops truncatus</i>) auditory brainstem responses on noise burst rise time, amplitude, and envelope shape0 aDependence of bottlenose dolphin iTursiops truncatusi auditory b  cJan-09-2018  a1741 - 17410 v1443 a<p>A series of experiments examined the dependence of dolphin auditory brainstem response (ABR) peak amplitudes and latencies by stimulus level, rise times, and envelope shape. Stimuli were spectrally &ldquo;pink&rdquo; noise bursts with frequency content from 10 to 160 kHz, rise times that varied from 32 &mu;s to 4 ms, and plateau sound pressure levels from 102 to 138 dB re 1 &mu;Pa. Cosine and cosine-cubed rise (and fall) envelopes were tested, and results were compared to those obtained for dolphins using noise bursts with linear rise envelopes [Finneran et al., J. Acoust. Soc. Am. 143, 2914&ndash;2921 (2018)]. Results for the cosine and cosine-cubed envelopes showed that ABR peak amplitudes were a function of envelope sound pressure at the end of a fixed integration window of approximately 260 &mu;s. This is congruent with the previous findings for linear envelopes. The ABR peak latencies for the cosine and cosine-cubed envelopes were dependent on the second derivative of the envelope pressure function, as opposed to the first derivative of the pressure function for linear envelopes. These data are consistent with single-unit and nearfield response data for terrestrial mammals. [Work supported by Navy Living Marine Resources and SSC Pacific Naval Innovative Science and Engineering Programs.]</p>
1 aJones, Ryan, A.1 aFinneran, James, J.1 aMulsow, Jason1 aBurkard, Robert, F.  uhttp://asa.scitation.org/doi/10.1121/1.5067722