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Unidirectional acoustic probe based on the particle velocity gradient.
Shiduo Yu1, Daniel Fernández Comesaña2, Graciano Carrillo Pousa2
1School of Marine Science and Technology, Northwestern Polytechnical University, No. 127 Youyixi Road, Xi'an, People's Republic of China chitianysd@foxmail.com.
The Journal of the Acoustical Society of America
|July 3, 2016
Summary
This study introduces a unidirectional acoustic probe using a particle velocity gradient. This directional acoustic probe effectively minimizes interference from unwanted sound sources, enhancing signal clarity.
Area of Science:
- Acoustics
- Sensor Technology
- Signal Processing
Background:
- Directional acoustic sensors are crucial for isolating desired sound signals.
- Minimizing interference from ambient noise and unwanted sources is a persistent challenge in acoustic measurements.
Purpose of the Study:
- To develop a unidirectional acoustic probe utilizing the particle velocity gradient.
- To achieve high directivity for improved acoustic source discrimination.
Main Methods:
- Employed two particle velocity sensors with figure-eight directivity patterns.
- Configured sensors in a first-order gradient arrangement to create the unidirectional probe.
Main Results:
- The developed probe demonstrated effective rejection of acoustic excitations from the sides and rear.
- Key parameters influencing probe performance were analyzed and discussed.
Conclusions:
- The particle velocity gradient approach provides a viable method for creating unidirectional acoustic probes.
- Experimental validation confirmed the theoretical predictions and practical efficacy of the proposed probe design.
