SBIR-STTR Award

Submersible Highly Dense Microphone Arrays for Turbulent Flow Sensing
Profile last edited on: 6/22/2021

Program
SBIR
Agency
Navy
Total Award Amount
$239,469
Award Phase
1
Principal Investigator
Amish Desai
Activity Indicator

Company Information

Tanner Research Inc

1851 Huntington Boulevard
Duarte, CA 91010
   (626) 471-9700
   labs-info@tanner.com
   www.tanner.com
Multiple Locations:   
Congressional District:   32
County:   Los Angeles

Phase I

Phase I year
2020
Phase I Amount
$239,469
A tight spatial understanding of turbulent boundary layers and unsteady surface pressure fields is key to reducing acoustic signatures and minimizing flow field energy losses, however, available sensing technology is not integrated and developed enough to deliver the high frequency, high spatial resolution flow field information needed. Therefore in Phase I, Tanner Research Inc. will design a compact turbulent flow microphone sensor array data collection system and conduct preliminary experiments on single sensors and small numbered sensor arrays, to validate key design aspects. Utilizing compact COTS MEMS microphones we will design a 100+ channel microphone array and data recorder system capable of 10kHz data acquisition frequency per sensor. The underwater environment and the high sensor density are key requirements in the selection of the type of microphone and the complexity of the packaging. Tanner will experimentally validate its approach in Phase I via simple underwater data collection and acoustic impedance testing with a few selected sensors and sensor post-packaging configurations. In Phase II, Tanner will re-design, construct, test, and deliver to the Navy a complete prototype underwater turbulent flow data acquisition system that can be tested in a marine environment.

Benefit:
A highly compact, high spatial resolution, novel underwater acoustic sensor array for unsteady flow field measurements that has the potential to allow for reduction of acoustic emissions for Navy underwater vehicles and associated sonar equipment.

Keywords:
acoustic measurement, acoustic measurement, Turbulent Boundary Layer Flow, Pressure Sensor Array, Unsteady Pressure Field, Underwater, Noise control, High Channel Count Arrays, Microphones

Phase II

Phase II year
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Phase II Amount
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