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United States Patent | 6,388,949 |
Lenhardt | May 14, 2002 |
A turtle alerting system and method utilizes an acoustic signal that may be provided in a first, low frequency range, a second, mid-frequency range, or a third, high frequency range. One or more of those acoustic signals may be accompanied and/or modulated by either an ultrasonic signal or a MHz signal, so as to provide a carrier for the acoustic signal. Further, a beam of light may be used as another type of alerting sensor. Lastly, a sonar may be used to steer the system in a direction in which turtles may be located.
Inventors: | Lenhardt; Martin L. (Hayes, VA) |
Assignee: |
Sound Technique Systems LLC
(Arlington,
VA)
|
Appl. No.: | 09/649,991 |
Filed: | August 29, 2000 |
Current U.S. Class: | 367/139 ; 116/22A |
Current International Class: | A01K 79/00 (20060101); A01K 79/02 (20060101); A01M 29/00 (20060101); A01M 29/02 (20060101); H04B 001/02 (); A01M 029/02 () |
Field of Search: | 367/139 116/22A |
4538249 | August 1985 | Richard |
4624220 | November 1986 | Olsson |
4646276 | February 1987 | Kowalewski et al. |
4805339 | February 1989 | Fuentes et al. |
4922468 | May 1990 | Menezes |
4955005 | September 1990 | Loeffelman |
5012457 | April 1991 | Mitchell et al. |
5046278 | September 1991 | Szilagyi et al. |
5168473 | December 1992 | Parra |
5291682 | March 1994 | Zaccheo |
5349774 | September 1994 | Parra |
5417006 | May 1995 | Schettino |
5448968 | September 1995 | Ostlie |
5559759 | September 1996 | Gerstein et al. |
5563849 | October 1996 | Hall et al. |
5570322 | October 1996 | Miller |
5602799 | February 1997 | Hecker et al. |
5610876 | March 1997 | Jeffers |
5627801 | May 1997 | Saunders |
5684755 | November 1997 | Saunders |
5730086 | March 1998 | Truebe |
5778591 | July 1998 | Oschman et al. |
D Mann et al., "Detection of Ultrasonic tones and simulated dolphin echolocation clicks by a teleost fish, the American shad", J. Acoust. Soc. Am. 104 (1), Jul. 1998, pp. 562-568. . Internet article, "Hearing Capabilities of Selected Fish Species", obtained from www.life.umd.edu/zoology/popperlab/hearingthresholds.htm, article obtained from Internet on Nov. 17, 1998. . Internet article, "Ultrasonic Hearing by American Shad", obtained from www.life.umd.edu/zoology/popperlab/hearingthresholds.htm, article obtained from Internet on Nov. 17, 1998. . "Sea Turtle Research Program Summary Report" --Army Engineering Waterways Experiment Station, Vicksburg, MS; Nov., 1997.. |