| Zugriffsnummer | 34255 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Towards an extension of primary hydrophone calibration using a laser vibrometer |
| Autor(in); Institution |
Weber, Martin; 1.6, Schall, PTB-Braunschweig
Wilkens, Volker; 1.6, Schall, PTB-Braunschweig
|
| Quelle/Jahr | The 22nd International Congress on Sound and Vibration, ICSV 22:(2015), 6 S. |
| Availability | [CD-ROM] ; file name: full_paper_223_20150429155115925.pdf |
| ISBN | 978-88-88942-48-3 |
| Verlag | Florence: |
| Konferenzangaben | 22nd International Congress on Sound and Vibration, ICSV22, Florence, 12-16, July, 2015, Italy |
| Klassifikationscode | PACS: 43.35.+d ; PACS: 43.38.+n ; PACS: 43.58.+z |
| Freie Schlagworte | Hydrophones ; Calibration ; Interferometry |
| Zusammenfassung | To extend the frequency range and to improve the accuracy of the primary calibration of hy-drophones, a novel setup comprising a high-frequency heterodyne laser vibrometer has been developed. The commercial vibrometer uses a carrier frequency of about 600 MHz which enables the measurement of ultrasonic signals up to frequencies of 100 MHz and beyond. Furthermore, it has the capability of measuring large displacement amplitudes and, therefore, allows the application of a broadband pulse calibration technique using high amplitude non-linearly distorted waveforms. The calibration principle and the experimental setup are described. The inherent noise of the vibrometer was investigated to determine the capability of measuring small amplitude sig-nals as well as the frequency bandwidth. First ultrasonic signals were acquired to show the capability of measuring broadband pressure pulses as well as narrowband sinusoidal pressure bursts, both of which are to be used in later hydrophone calibration applications. |
