Development of an Acoustic Standing Wave Vessel for Directionality Measurements
Abstract
The Sensor Research Lab (SRL) at NPS has been developing a biologically inspired microelectromechanical system (MEMS) sensor that is capable of determining the direction of an acoustic signal. This sensor has been well characterized in air, but not thoroughly tested in the underwater environment. NPS facilities are not suitable for properly characterizing the sensors response over the intended frequency range, and partner facilities are expensive and logistically challenging to utilize. To shorten development cycle while decreasing costs, the SRL is developing a standing wave tube to serve as a testing environment for these sensors. The standing wave tubes acoustic properties were confirmed by comparing calibrated hydrophone measurements with the results of a finite element analysis carried out using COMSOL Multiphysics software. After characterizing the acoustic field inside the tube, sensor characterization measurements were taken in the standing wave tube and were compared to results measured in underwater facilities of partner Naval Warfare Centers. Analysis of measurements results indicated that comparable or better results could be achieved in the standing wave tube for a fraction of the water volume and cost.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2023
- Accession Number
- AD1213494
Entities
People
- Reed T. Herzog
Organizations
- Naval Postgraduate School