Audio Frequency Calibration of Hydrophones Using a Cylindrical Wave Guide

Scientists use hydrophones (underwater microphones) to listen and record to ocean sounds from marine wildlife as well as ship noise. To produce trusted results, hydrophones must be calibrated using tanks. This is done by checking the hydrophone measurements against reference sounds. Scientists can easily calibrate hydrophones for sounds that are very high pitch and very low pitch. To calibrate sounds that are in-between, a very large tank is needed. The project proposes an alternative method of calibration of these mid-range sounds which uses a long pipe instead of a tank. This method would be more practical for researchers and manufacturers to use to calibrate hydrophones.

Faculty Supervisor:

David Barclay

Student:

Partner:

Ocean Sonics Ltd

Discipline:

Physics

Sector:

Professional, scientific and technical services

University:

Dalhousie University

Program: