Feature

Hydrophone calibration achieves exceptional results

Dorset based Precision Acoustics achieves exceptional results calibrating a hydrophone - normally used to detect ultrasound - at sonar frequencies.

04/02/2016 12:32:05

Precision Acoustics was asked whether it could calibrate one of its 1mm needle hydrophones well below the normal working frequency range. Working together with Neptune Sonar, the hydrophone was deployed on a site in Kelk, Yorkshire, where sonar equipment is often tested outdoors as well as under laboratory conditions.

Standard needle hydrophones are designed typically to detect ultrasound in the 500kHz to 50MHz frequency range. Precision Acoustics was able to calibrate the equipment in Kelk under the recent winter conditions and successfully obtained data as low as 30kHz demonstrating both the exceptional performance characteristics of the needle hydrophones, as well as the exacting nature of the calibration job.

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.