Zobrazeno 1 - 6
of 6
pro vyhledávání: '"P N Gélat"'
Publikováno v:
Measurement Science and Technology. 18:N47-N52
A method for correcting the electrical impedance and open-circuit receive sensitivity of a hydrophone for the effect of an added extension cable is described. The method requires the measurement of the complex electrical impedance of both the hydroph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b356680aeb20a6c332ce0d4dcc58833d
https://doi.org/10.1088/0957-0233/18/7/n03
https://doi.org/10.1088/0957-0233/18/7/n03
Publikováno v:
Journal of Physics: Conference Series. 1:105-110
A novel concept for an ultrasonic power meter is presented which utilises the pyro-electric effect of a thin membrane of the piezo-electric polymer, pvdf. One side of the membrane is in intimate contact with a polyurethane-based acoustical absorber.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bb5225caae5601f9cec18d272657a69
https://doi.org/10.1088/1742-6596/1/1/025
https://doi.org/10.1088/1742-6596/1/1/025
Publikováno v:
Measurement Science and Technology. 14:796-806
Finite element techniques have been used to design a controlled-clearance piston–cylinder pressure balance for operation in liquid media in the 250 MPa range in which the effective area is predictable, insensitive to variations in key geometrical a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5555a93519b2b0d15f26a5598cecdbb9
https://doi.org/10.1088/0957-0233/14/6/313
https://doi.org/10.1088/0957-0233/14/6/313
Publikováno v:
Metrologia. 36:331-343
A laser interferometer designed to measure acoustic displacements at megahertz frequencies, which has been the basis of a primary standard for the calibration of ultrasonic hydrophones for over ten years, is described. The interferometer is of the Mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::945631c7c10d8dd21397a36c05ffea64
https://doi.org/10.1088/0026-1394/36/4/13
https://doi.org/10.1088/0026-1394/36/4/13
Publikováno v:
Journal of Physics: Conference Series. 498:012002
Since their original inception as ultrasound contrast agents, potential applications of microbubbles have evolved to encompass molecular imaging and targeted drug delivery. As these areas develop, so does the need to understand the mechanisms behind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8c4c874e1ac4328c49ee6acc89fecdd
https://doi.org/10.1088/1742-6596/498/1/012002
https://doi.org/10.1088/1742-6596/498/1/012002
Publikováno v:
Journal of Physics: Conference Series. 1:230-230
The aim of this work is to predict the acoustic pressure field produced by a seven-element foetal heart monitoring transducer for a given sinusoidal voltage input. As each element is nominally identical, an axisymmetric model of the single-element tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c05230394e5b08f7f001abf7b80ac43
https://doi.org/10.1088/1742-6596/1/1/050
https://doi.org/10.1088/1742-6596/1/1/050