United States Patent | 6,418,792 |
Spychalski | July 16, 2002 |
A pressure compensated sound transducer is provided wherein compensation and equalization of static ambient pressure variations occurring on the faces of at least one piezoelectric element is achieved by a mensural compensating duct communicating compensating fluid between two reservoirs, each located on an opposite face of a piezoelectric element. One reservoir is formed in the void of the support housing containing at least one piezoelectric element; the remaining reservoir is formed in the void between the housing and a sealed impermeable, compliant boot. The sealed boot prevents contamination of the compensating fluid from the external environment and loss of the compensating fluid to the outside environment.
Inventors: | Spychalski; Stephen Edward (11501 Coleman Rd., Gulfport, MS 39503) |
Appl. No.: | 405194 |
Filed: | September 24, 1999 |
Current U.S. Class: | 73/649; 73/54.16; 367/167 |
Intern'l Class: | G01N 029/00; H04R 017/00 |
Field of Search: | 73/649,570,152.27,54.16 381/189 367/167,172 |
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