Accession Number : ADA535211


Title :   Audiogram of a Stranded Blainville's Beaked Whale (Mesoplodon Densirostris) Measured using Auditory Evoked Potentials


Descriptive Note : Scientific rept.


Corporate Author : HAWAII INST OF MARINE BIOLOGY KAILUA HI MARINE MAMMAL RESEARCH PROGRAM


Personal Author(s) : Nachtigall, Paul E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a535211.pdf


Report Date : 18 Jan 2011


Pagination or Media Count : 18


Abstract : Quantifying and understanding the impact of anthropogenic sound on marine mammals has been the focus of many researchers both in laboratory settings as well as in the field. This study presents the audiogram of a sub-adult Blainville's beaked whale that stranded in Hawaii. The hearing measurements were conducted using the non-invasive auditory brainstem response technique and a total of 11 sinusoidally amplitude modulated tones were tested ranging from 5.6 to 160 kHz. The audiogram data indicated that the region of best hearing was found between 40 and 50 kHz with thresholds below 50 dB. These results match the frequency range obtained from the hearing measurements of a Gervais' beaked whale previously tested using contact acoustic stimulation and emphasize the importance of obtaining rapid hearing measurements on live stranded animals to improve the understanding of poorly known species.


Descriptors :   *HEARING , *WHALES , *AQUATIC ANIMALS , ACOUSTICS , ANIMALS , ANTHROPOLOGY , AMPLITUDE MODULATION , FREQUENCY , AUDIO TONES , MAMMALS , MEASUREMENT , NOISE(SOUND)


Subject Categories : Biology
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE