发明名称 |
Marine acoustic aerobuoy and method of operation |
摘要 |
A marine acoustic detector for use in identifying a characteristic airborne sound pressure field generated by a propeller-driven aircraft including a surface-buoyed resonator chamber tuned to the narrow frequency band of the airborne sound pressure field and having a dimensioned opening formed into a first endplate of the chambver for admitting the airborne sound pressure field. Mounted within the resonator chamber is a transducer circuit comprising a microphone and a pre-amplifier, the microphone functioning to detect the resonating sound pressure field within the chamber and to convert the resonating sound waves into an electrical signal while the pre-amplifier functions to amplify the electrical signal for transmission via a cable to an underwater or surface marine vehicle to undergo signal processing. The sound amplification properties of the resonator air chamber are exploited in the passive detection of propeller-driven aircraft at airborne ranges exceeding thoses ranges of visual or sonar detection to provide 44 dB of received sound amplification at common aircraft frequencies below 100 Hz.
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申请公布号 |
US5060206(A) |
申请公布日期 |
1991.10.22 |
申请号 |
US19900587389 |
申请日期 |
1990.09.25 |
申请人 |
ALLIED-SIGNAL INC. |
发明人 |
DEMETZ, SR., FREDERICK C. |
分类号 |
G01V1/00;G10K11/04 |
主分类号 |
G01V1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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