Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Allan C. Tims"'
Publikováno v:
The Journal of the Acoustical Society of America. 91:2325-2326
Two cylindrical, high‐gain, wide‐band (three octaves) passive arrays have been recently developed. Both arrays consist of 36 lead titanate elements mounted on a cylindrical structure. The elements are arranged in a 3×12 configuration with the 12
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c746a3510a7a8047c8ca8c090d2772b7
https://doi.org/10.1121/1.403522
https://doi.org/10.1121/1.403522
Publikováno v:
The Journal of the Acoustical Society of America. 100:2897
A low frequency flex-beam underwater acoustic transducer has a base, a flexible beam having one end cantilever mounted on the base, and piezoelectric driving means, for flexurally driving the beam. The piezoelectric driving means operates in the k 31
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::520eca94093b6035f289696d69b7894e
https://doi.org/10.1121/1.417197
https://doi.org/10.1121/1.417197
Publikováno v:
The Journal of the Acoustical Society of America. 93:2306-2306
The purpose of this study was to determine the effects of encapsulation methods on the acoustic performance of a passive, cylindrical, high gain, broadband (multi‐octave) array. Both an oil‐filled boot and a polyurethane coating were considered.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86da06e6b550af89cfbf3423b39144f2
https://doi.org/10.1121/1.406449
https://doi.org/10.1121/1.406449
Publikováno v:
The Journal of the Acoustical Society of America. 88:S7-S7
This paper covers the practical aspects of implementing near‐field calibration arrays, given a specific set of shading values and array aperture. Methods of selecting and calibrating the active elements are presented, as are shading methods and tes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d760144f7fae18311780b6d1724f8d1
https://doi.org/10.1121/1.2029169
https://doi.org/10.1121/1.2029169
Autor:
Allan C. Tims, Ivor D. Groves
Publikováno v:
The Journal of the Acoustical Society of America. 48:725-728
Smooth response, omnidirectionality, and wide dynamic range are features of a new reference standard probe hydrophone for the frequency range 10 Hz 200 kHz at hydrostatic pressure to 1000 psig and temperature from 5° to 35°C. The nominal end‐of c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7de46ac838f11ae9db463c9110705755
https://doi.org/10.1121/1.1912195
https://doi.org/10.1121/1.1912195
Autor:
Craig K. Brown, Allan C. Tims
The development and design of prototype hydrophones for the Versatile Experimental Kevlar Array (VEKA), a distributed-sensor suspended cable system, and a 32-channel Shipboard Acoustic Receiving Amplifier (SARA) is presented. The approach was to desi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0853ff23d4f2396969b162cfb51500d
https://doi.org/10.21236/ada067400
https://doi.org/10.21236/ada067400
Autor:
Allan C Tims
This report presents analysis of the self-noise which determines the threshold pressure level in hydrophone designs. The noise present in the acoustic sensor, coupling network, and preamplifier input stage are represented by an equivalent circuit noi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a96983fcede02be481a19dc55d3f8e33
https://doi.org/10.21236/ada053449
https://doi.org/10.21236/ada053449
Autor:
Theodore A. Henriquez, Allan C. Tims
Publikováno v:
The Journal of the Acoustical Society of America. 79:1195-1196
A shock-hardened hydrophone comprising a sensor electrically connected to aow output-impedance preamplifier by a circuitboard. The sensor includes two metal cups, each cup with a piezoelectric ceramic disk positioned therein for generating a potentia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc64da0c49527f4bbef55f6fa250208d
https://doi.org/10.1121/1.393357
https://doi.org/10.1121/1.393357
Publikováno v:
The Journal of the Acoustical Society of America. 68:1550-1550
A fiber optic hydrophone for use as an underwater electroacoustic standard. The hydrophone includes a fiber optic acoustic wave detector in one end of the hydrophone which is subjected to incident acoustical waves. A similar fiber optic is in an acou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0e7460e9c103d76c80c1153567c4282
https://doi.org/10.1121/1.385066
https://doi.org/10.1121/1.385066