Two Canted Mems Acoustic Sensors for Finding Direction in Underwater
Abstract
Micro electromechanical system (MEMS)-based acoustic sensors can be operated in the pressure gradient mode to obtained direction of underwater sound. A single MEMS sensor is unable to resolve left and right ambiguity due to cosine directional response. However, recent measurements carried out in air using two such sensors mounted at a canted angle allowed the determination of baring of sound unambiguously. In this thesis, the work carried out in air will be extended for applications in underwater by using two canted MEMS sensors packaged operate in an underwater environment. The canted system will be characterized in an anechoic chamber with and without underwater packaging and then using the NPS water tanks. The measurements include frequency and directional responses to determine their ability of operating in an underwater environment to accurately obtaining the bearing of sound.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2020
- Accession Number
- AD1196747
Entities
People
- Kwangjun Park
Organizations
- Naval Postgraduate School