G - Physics – 10 – K
Patent
G - Physics
10
K
119/2, 317/2, 34
G10K 1/00 (2006.01) A01K 15/02 (2006.01) A01K 79/02 (2006.01) G10K 1/072 (2006.01) G10K 9/10 (2006.01)
Patent
CA 1235930
ABSTRACT An acoustic device for eliciting either attraction or repulsion behavioural responses in fish comprises a water tight enclosure having a radiating surface rigidly supported in one end thereof. Drive means for the radiating surface are provided with the capability of causing the radiating surface to vibrate at its resonant frequencies so that an acoustic signal is generated capable of a peak sound pressure level of at least 0.5 kPa (0 to peak) at a distance of 3 meters from the radiating surface. The signal generated has one fundamental frequency component in the range 20 to 1000 Hz and a plurality of resonant and harmonic frequencies associated with said fundamental frequency. The drive means, radiating surface and enclosure coact to generate an acoustic signal having characteristics such as resonant frequencies, peak pressures and temporal patterns which may be select- ively optimized to produce the desired behavioural response.
524718
Christie Alan E.
Forest Jerry W.
Kowalewski Janusz J.
Patrick Paul H.
Christie Alan E.
Forest Jerry W.
Kowalewski Janusz J.
Patrick Paul H.
Ridout & Maybee Llp
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