Method of alerting sea cows of the danger of approaching motor v

Details Method of alerting sea cows of the danger of approaching motor v Method of alerting sea cows of the danger of approaching motor v

1998-01-23

1998-12-15

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

Animal control

116 22A, H04B 102

Patent

active

058503722

ABSTRACT:
A method of alerting sea cows to the existence of danger underwater includes generating a modulated acoustical signal in a predetermined source frequency band and sound pressure level and projecting the generated signal underwater in a directional manner and in a direction corresponding with the direction of travel of a motor vessel, wherein the projected modulated acoustical signal has an underwater frequency ranging between 3 kHz and 26 kHz.

REFERENCES:
patent: 4922468 (1990-05-01), Menezes
patent: 5142505 (1992-08-01), Peynaud
patent: 5303204 (1994-04-01), Wertsberger
patent: 5559759 (1996-09-01), Gerstein et al.
Twiss, J. R., "Manatee:Endangered Marine Mammal", Water Spectrum, V12, Ni P10(8), 1979.
Dold, C., "Hearing of Manatees May Prove to be key to Protecting Species", N.Y. Times, Sec. C., p. 4, Aug. 25, 1992.

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