Acoustic Sensor with Improved Low-Frequency Detection
Low-frequency acoustic sensing is critical for underwater target detection and sound source localization, yet the sensitivity of conventional vector hydrophones is fundamentally limited by the resonance of suspended co-oscillating structures. This paper presents a transmissive electrochemical vector hydrophone with horn-driven particle velocity amplification. By adopting a fixed transmissive configuration, structural resonance is effectively eliminated, while the horn structu
A new type of hydrophone has been developed to enhance low-frequency sound detection underwater. The device uses a transmissive design to avoid structural resonance issues. A horn structure is incorporated to amplify particle velocity, improving sensitivity. The mechanism of velocity amplification and its interaction with electrical conversion is studied. Simulations explore how horn shape and structure affect performance. Testing shows high sensitivity and a broad frequency range. The hydrophone maintains linearity and a wide dynamic range. It has a directional pattern that is effective for underwater applications. This technology could be used for monitoring oceans and detecting underwater objects.
It offers improved capabilities for underwater acoustic monitoring and detection.
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