Sonar gain control in echolocating finless porpoises (Neophocaena phocaenoides) in an open water

Songhai Li; Ding Wang; Kexiong Wang; Tomonari Akamatsu

doi:10.1121/1.2335674

Sonar gain control in echolocating finless porpoises (Neophocaena phocaenoides) in an open water

J Acoust Soc Am. 2006 Oct;120(4):1803-6. doi: 10.1121/1.2335674.

Authors

Songhai Li¹, Ding Wang, Kexiong Wang, Tomonari Akamatsu

Affiliation

¹ Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China.

PMID: 17069278
DOI: 10.1121/1.2335674

Abstract

Source levels of echolocating free-ranging Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) were calculated using a range estimated by measuring the time delays of the signals via the surface and bottom reflection paths to the hydrophone, relative to the direct signal. Peak-to-peak source levels for finless porpoise were from 163.7 to 185.6 dB re: 1 microPa. The source levels are highly range, dependent and varied approximately as a function of the one-way transmission loss for signals traveling from the animals to the hydrophone.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustics
Animals
Conservation of Natural Resources
Echolocation / physiology*
Equipment Design
Mathematical Computing
Porpoises / physiology*
Vocalization, Animal*
Water

Substances

Water