Method of alerting marine mammals and other mammals underwater o

Details Method of alerting marine mammals and other mammals underwater o Method of alerting marine mammals and other mammals underwater o

1994-12-09

1996-09-24

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

Animal control

367137, 367909, H04B 102

Patent

active

055597599

ABSTRACT:
A method of alerting marine mammals and other mammals underwater to the danger of approaching motor vessels includes generating a pulsed acoustical signal at a predetermined source frequency and at a fixed or variable (with boat speed) sound pressure level and projecting the generated signal underwater in a highly directional manner from a motor vessel and in a direction corresponding with the direction of travel of the motor vessel or from fixed hazards which present a danger to mammals underwater; the projected pulsed acoustical signal having 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
Twiss, J. R., "Manatee: Endangered Marine Mammal" Water Spectrum, Winter 79-80, V12, N1, P10 (8).

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