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Akademický článek
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Autor:
E. R. Smith, Earle Jones
Publikováno v:
The Journal of the Acoustical Society of America. 29:1250-1250
This paper reports further progress in our development of methods for calibrating vibration pickups using the wavelength of light as the standard length. Methods described previously [J. Acoust. Soc. Am. 27, 728 (1955); 28, 780 (1956) and to be publi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66f5114913ac3f111503cc423fbc9cdd
https://doi.org/10.1121/1.1918995
https://doi.org/10.1121/1.1918995
Autor:
Smith, Ernest R., Jones, Earle
Publikováno v:
Journal of the Acoustical Society of America; 1957, Vol. 29 Issue 11, p1250-1250, 1p
Publikováno v:
The Journal of the Acoustical Society of America. 69:853-859
Miniature piezoelectric polymer hydrophones for ultrasonic field characterization in the low megahertz region have been developed and tested. The principal advantages of these devices over conventional hydrophones are their uniform frequency response
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64a9baeee4f801f5d8f8f308cd6ecfbb
https://doi.org/10.1121/1.385541
https://doi.org/10.1121/1.385541
Publikováno v:
The Journal of the Acoustical Society of America. 30:867-870
This paper describes measurement of vibration amplitude with a Fizeau type interferometer using pulses of monochromatic light of adjustable phase. The interferometer is used to calibrate vibration pickups over the frequency range from 100 to 20 000 c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08ed6bfcf44a319069e9376b7a1691af
https://doi.org/10.1121/1.1909793
https://doi.org/10.1121/1.1909793
Publikováno v:
The Journal of the Acoustical Society of America. 27:728-734
This paper describes cemented barium titanate accelerometers of two simple types, an electromagnetic shaker with a symmetrically mounted shake table, a set of barium titanate shakers, and two optical methods of accelerometer calibration, one using a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::824d87ec50617ca4eeec4eaa4d92a7a9
https://doi.org/10.1121/1.1908009
https://doi.org/10.1121/1.1908009
Publikováno v:
Rubber Chemistry and Technology. 30:449-459
An apparatus has been developed for the direct measurement of the real and imaginary parts of the dynamic bulk modulus of solid and liquid materials over the frequency range of 50 to 10,000 cps. Piezoelectric crystals serving as driver and detector,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83e240acabe20eecf705543445e435f6
https://doi.org/10.5254/1.3542696
https://doi.org/10.5254/1.3542696
Publikováno v:
The Journal of the Acoustical Society of America. 48:1040-1043
Improved poling techniques have led to improvement in the piezoelectric activity of bulk polymers. Results now achieved approach the activity of conventional piezoelectric materials such as quartz, and further improvement is anticipated. The measured
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a19dee6f38b739551e015422e0c4de59
https://doi.org/10.1121/1.1912242
https://doi.org/10.1121/1.1912242
Autor:
Moody C. Thompson, Richard V. Waterhouse, Seymour Edelman, Raymond D. Berendt, Richard K. Cook
Publikováno v:
The Journal of the Acoustical Society of America. 27:1072-1077
Reverberation chambers used for acoustical measurements should have completely random sound fields. We denote by R the cross‐correlation coefficient for the sound pressures at two points a distance r apart. R = 〈p1p2〉Av/(〈p12〉Av〈p22〉Av)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4dccbc78a0e8142e2f8e1afa545ed19
https://doi.org/10.1121/1.1908122
https://doi.org/10.1121/1.1908122