dc.contributor.author | Drinnan, Robert | |
dc.date.accessioned | 2023-08-14T18:04:29Z | |
dc.date.available | 2023-08-14T18:04:29Z | |
dc.date.issued | 2023-08-08 | |
dc.identifier.uri | http://hdl.handle.net/10222/82780 | |
dc.description.abstract | Modern hydrophone calibration techniques typically require sensors to be placed in a free field or within a hydrostatically varying chamber. Between 1 kHz and 10 kHz, the wavelength in water is too long for free-field conditions to be used in common tank sizes. A novel technique to calibrate hydrophones is investigated to address the measurement gap between very low-frequency and high-frequency techniques. Calibrations are performed in a 12-meter copper tube coiled into a 1-meter diameter helix. This elastic waveguide decreases the speed of sound within the apparatus, providing a longer reverb-free time for calibrations using a small volume. The propagation within the waveguide is studied with the deviations from the predicted theory discussed. Calibrations performed on Ocean Sonics icListen hydrophones are shown to be within 1 dB of independently calibrated
reference measurements. This research demonstrates that using elastic waveguides is an effective and simple low-frequency hydrophone calibration method. | en_US |
dc.language.iso | en | en_US |
dc.subject | Calibration | en_US |
dc.subject | Underwater acoustics | en_US |
dc.subject | Sound in pipes | en_US |
dc.title | Low-Frequency Hydrophone Calibration Using Elastic Waveguides | en_US |
dc.date.defence | 2023-06-15 | |
dc.contributor.department | Department of Oceanography | en_US |
dc.contributor.degree | Master of Science | en_US |
dc.contributor.external-examiner | N/A | en_US |
dc.contributor.graduate-coordinator | Dr. David Barclay | en_US |
dc.contributor.thesis-reader | Dr. Craig Brown | en_US |
dc.contributor.thesis-reader | Dr. Jean-Francois Bousquet | en_US |
dc.contributor.thesis-supervisor | Dr. David Barclay | en_US |
dc.contributor.ethics-approval | Not Applicable | en_US |
dc.contributor.manuscripts | No | en_US |
dc.contributor.copyright-release | No | en_US |