PERFORMANCE CHARACTERISTICS OF A VECTOR SENSOR ARRAY IN AN ENERGETIC TIDAL CHANNEL

Conference · Fri Jul 05 00:00:00 EDT 2019

OSTI ID:1891335

Raghukumar, Kaustubha; Chang, Grace; Spada, Frank; Jones, Craig ^[1]; Spence, Jesse ^[2]; Griffin, Sean ^[3]; Roberts, Jesse

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1. Integral Consulting, Inc., Seattle, WA (United States)
2. Noise Control Engineering
3. Proteus Technologies

A compact three-dimensional vector sensor array (termed the NoiseSpotter) was recently developed with the goal of characterizing and localizing sources of sound in energetic environments such as those where marine renewable energy devices are likely to be located. The three vector sensors on the NoiseSpotter are mounted on a bottom platform with each sensor suspended inside an optional flow noise removal shield. The multiple pressure and particle velocity channels on the NoiseSpotter are simultaneously sampled and stored on-board to enable coherent array processing of vector sensor array data. A series of field trials were conducted where the NoiseSpotter was deployed on a bottom platform in an 8 m deep tidal channel in Sequim Bay, Washington. Pure tones were transmitted from a drifting vessel whose distance from the bottom platform varied between 50 m and 500 m. The effect of flow noise on vector sensor array performance is quantified along with the detectability of low intensity sound in an energetic environment. Flow noise removal efficiency for each channel of every vector sensor is demonstrated using multiple metrics derived from the active and reactive intensities computed using the pressure-velocity cross-spectral density matrix. A flow noise removal shield is shown to improve the detectability of low intensity sound such as those that are expected to be emitted by marine renewable energy devices.

• Research Organization: Integral Consulting, Inc., Seattle, WA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office
• DOE Contract Number: EE0007822
• OSTI ID: 1891335
• Resource Relation: Conference: Underwater Acoustics Conference and Exhibition, Heraklion, Greece, June 30- July 5, 2019.
• Country of Publication: United States
• Language: English