| Zugriffsnummer | 19967 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Construction and characterization of a broadband reference PVDF membrane hydrophone for comparisons of hydrophone calibration methods up to 140 MHz |
| Autor(in); Institution |
Wilkens, Volker; 1.6, Schall, PTB-Braunschweig
Molkenstruck, Walter; 1.6, Schall, PTB-Braunschweig
|
| Quelle/Jahr | 2006 IEEE Ultrasonics Symposium:(2006), 532 - 535 |
| Availability | [CD-ROM] ; file name: F2F-1.pdf |
| ISBN | 1-4244-0202-6 |
| Verlag | Piscataway, NJ: IEEE Operations Center |
| Konferenzangaben | IEEE Ultrasonics Symposium, Vancouver, 03-06, October, 2006, Canada |
| Freie Schlagworte | Hydrophone ; Calibration ; Exposimetry |
| Zusammenfassung | A PVDF membrane hydrophone has been constructed in particular for comparisons of broadband ultrasound hydrophone calibration methods and for intercomparisons of different calibration laboratories. The hydrophone design chosen has a foil thickness of 9 μ and an electrode diameter of 210 μm. A very broadband differential preamplifier is integrated to achieve a high signal-to-noise ratio over a broad frequency range. The hydrophone was calibrated by means of a primary interferometric calibration technique in the range from 2 MHz to 60 MHz, by substitution calibration using time delay spectrometry in the range from 1 MHz to 40 MHz, and by complex broadband pulse calibration using nonlinear sound propagation in the range from 1 MHz to 140 MHz. The results show a very flat frequency response up to 40 MHz and a thickness mode resonance at about 105 MHz, and they indicate a useable bandwidth up to 140 MHz. The effective diameter as derived from directional response measurements is 240 μm at high frequencies. |
