Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Seymour Edelman"'
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
Autor:
Julius Cohen, Seymour Edelman
Publikováno v:
Journal of Applied Physics. 42:3072-3074
The direct piezoelectric effect has been observed in roll‐elongated films of polyvinylchloride and polyvinylfluoride. The effect was produced by applying tensile stress to a clamped specimen at a fixed frequency of 20 Hz. The piezoelectric modulus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c9858b0f169fa58e4914042979c0710
https://doi.org/10.1063/1.1660687
https://doi.org/10.1063/1.1660687
The report describes the construction, testing and calibration of piezoelectric polymer sensing transducers of two sizes. The piezoelectric material was obtained by poling 25 micrometer thick, polyvinylidene fluoride sheet. Sensors with an active are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72e81c05b3a6931f7812a8b63b32c653
https://doi.org/10.6028/nbs.ir.76-1078
https://doi.org/10.6028/nbs.ir.76-1078
Publikováno v:
Optical Engineering. 8
A technique is described for calibrating shock accelerometers by measuring the Doppler shift in light frequency produced by the change in velocity of a target. The system employs a quadrature laser interferometer and a single-side-band carrier insert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::948c321761569ec57d070b5d5ce18bae
https://doi.org/10.1117/12.7971525
https://doi.org/10.1117/12.7971525