Accession Number:

ADA265023

Title:

Definition of the Acoustical Structure of Echolocation Pulse Trains of an Atlantic Bottlenose Dolphin in Captivity

Descriptive Note:

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Personal Author(s):

Report Date:

1990-12-28

Pagination or Media Count:

15.0

Abstract:

Echolocation capabilities of an Atlantic bottlenose dolphin, Tursiops truncatus, were observed in a target detection experiment. Pulse trains occurring during the echolocation sequence were then analyzed in an effort to determine the animals average frequency range, choice of center frequency, bandwidth, pulse repetition rate, pulse duration, amplitude, and signal-to- noise-ratio SNR. The animal was trained to detect a polypropylene ring measuring 14.34 centimeters in diameter. Target ranges of 11.582 meters and 15. 85 meters were used. Signal-to-noise-ratio SNR was determined as a function of pool ambient noise and reverberation characteristics at each target range. The animal was observed to be consistent in its performance at the correct response threshold of 75 percent.

Subject Categories:

  • Biological Oceanography
  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE