发明名称 |
PHASE INSENSITIVE ULTRASONIC TRANSDUCER |
摘要 |
A phase insensitive ultrasonic transducer which includes a CdS crystal that is annealed for a selected period of time and at a selected temperature to provide substantially maximum acoustic attenuation at the operating frequency of the transducer. Two electrodes are attached to the crystal with amplifier means and a signal processing system connected to one of the electrodes to provide an ultrasonic receiver. |
申请公布号 |
GB2029091(B) |
申请公布日期 |
1983.03.02 |
申请号 |
GB19790023867 |
申请日期 |
1979.07.09 |
申请人 |
NATIONAL AERONAUTICS & SPACE ADMINISTRATION |
发明人 |
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分类号 |
H04R17/00;B06B1/06;(IPC1-7):01L41/22;04R17/10 |
主分类号 |
H04R17/00 |
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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