The Journal of the Acoustical Society of America, 1992
A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydro... more A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydrophone, but be insensitive to vibrations received through its mount. The hydrophone consists of two pieces of piezoceramic, one a standard ceramic, and the other a ceramic which contains anisotropic pores (or macrovoids) to increase its sensitivity to hydrostatic pressure. The two pieces of ceramic are mechanically bonded together, and the output signals of the two are subtracted from one another to achieve the noise suppression. This transducer is unique in that its uniaxial insensitivity is achieved entirely by electrical means. Various versions of this transducer were constructed and put through a uniaxial vibration test. Upon achieving satisfactory insensitivity to uniaxial vibrations, the transducer was subject to an underwater free-field voltage sensitivity measurement. Results from both tests indicated that the Noise-Suppressing Hydrophone_ could be effective in the frequency range tested. 14. SUIUECT TERMS IS. NUMBER OF PAGES 66
Journal of the Acoustical Society of America, Aug 1, 1993
A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydro... more A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydrophone, but be insensitive to vibrations received through its mount. The hydrophone consists of two pieces of piezoceramic, one a standard ceramic, and the other a ceramic which contains anisotropic pores (or macrovoids) to increase its sensitivity to hydrostatic pressure. The two pieces of ceramic are mechanically bonded together, and the output signals of the two are subtracted from one another to achieve the noise suppression. This transducer is unique in that its uniaxial insensitivity is achieved entirely by electrical means. Various versions of this transducer were constructed and put through a uniaxial vibration test. Upon achieving satisfactory insensitivity to uniaxial vibrations, the transducer was subject to an underwater free-field voltage sensitivity measurement. Results from both tests indicated that the Noise-Suppressing Hydrophone_ could be effective in the frequency range tested. 14. SUIUECT TERMS IS. NUMBER OF PAGES 66
The Journal of the Acoustical Society of America, 1992
A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydro... more A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydrophone, but be insensitive to vibrations received through its mount. The hydrophone consists of two pieces of piezoceramic, one a standard ceramic, and the other a ceramic which contains anisotropic pores (or macrovoids) to increase its sensitivity to hydrostatic pressure. The two pieces of ceramic are mechanically bonded together, and the output signals of the two are subtracted from one another to achieve the noise suppression. This transducer is unique in that its uniaxial insensitivity is achieved entirely by electrical means. Various versions of this transducer were constructed and put through a uniaxial vibration test. Upon achieving satisfactory insensitivity to uniaxial vibrations, the transducer was subject to an underwater free-field voltage sensitivity measurement. Results from both tests indicated that the Noise-Suppressing Hydrophone_ could be effective in the frequency range tested. 14. SUIUECT TERMS IS. NUMBER OF PAGES 66
Journal of the Acoustical Society of America, Aug 1, 1993
A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydro... more A Noise-Suppressing Hydrophone, patented by Manfred Kahn, is supposed to function as a good hydrophone, but be insensitive to vibrations received through its mount. The hydrophone consists of two pieces of piezoceramic, one a standard ceramic, and the other a ceramic which contains anisotropic pores (or macrovoids) to increase its sensitivity to hydrostatic pressure. The two pieces of ceramic are mechanically bonded together, and the output signals of the two are subtracted from one another to achieve the noise suppression. This transducer is unique in that its uniaxial insensitivity is achieved entirely by electrical means. Various versions of this transducer were constructed and put through a uniaxial vibration test. Upon achieving satisfactory insensitivity to uniaxial vibrations, the transducer was subject to an underwater free-field voltage sensitivity measurement. Results from both tests indicated that the Noise-Suppressing Hydrophone_ could be effective in the frequency range tested. 14. SUIUECT TERMS IS. NUMBER OF PAGES 66
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