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Spiral Sound Wave Transducer Based on the Longitudinal Vibration
Wei Lu1,2,3, Yu Lan4,5,6, Rongzhen Guo7
1Acoustic Science and Technology Laboratory, Harbin Engineering University of China, Harbin 150001, China. luwei@hrbeu.edu.cn.
Sensors (Basel, Switzerland)
|November 2, 2018
Summary
Researchers developed a novel spiral sound wave transducer using longitudinal vibrating elements. This device effectively generates low-frequency underwater acoustic spiral waves, confirmed by simulations and experiments.
Area of Science:
- Acoustics
- Transducer Technology
- Wave Physics
Background:
- Spiral sound waves are complex acoustic phenomena with potential applications in underwater acoustics.
- Generating controlled spiral sound waves requires specialized transducer designs.
- Existing methods for generating spiral waves may have limitations in efficiency or frequency range.
Purpose of the Study:
- To propose and validate a novel spiral sound wave transducer design.
- To investigate the theoretical basis for generating spiral sound waves using longitudinal vibrating elements.
- To demonstrate the practical fabrication and performance of the designed transducer for underwater applications.
Main Methods:
- Theoretical analysis of spiral sound wave generation using orthogonal acoustic dipoles with a 90-degree phase difference.
- Design and three-dimensional finite element modeling (FEM) for simulating transducer vibration modes and acoustic characteristics.
- Fabrication of the spiral sound wave transducer based on design and simulation.
- Experimental measurement of transducer performance, including resonance frequency and transmitting voltage resonance.
- Underwater sound field measurements to verify spiral sound wave generation.
Main Results:
- The transducer, composed of eight radially distributed longitudinal vibrating elements, effectively generates low-frequency underwater acoustic spiral waves.
- Finite element modeling accurately predicted the transducer's vibration modes and acoustic properties.
- The fabricated transducer exhibited a resonance frequency of 10.8 kHz and a transmitting voltage resonance of 140.5 dB.
- Underwater sound field measurements confirmed the successful generation of spiral sound waves by the designed transducer.
Conclusions:
- A novel spiral sound wave transducer utilizing longitudinal vibrating elements has been successfully designed, simulated, and fabricated.
- The proposed design effectively generates low-frequency underwater acoustic spiral waves, validating the underlying theoretical principles.
- This research contributes a practical solution for generating spiral sound waves, opening possibilities for advanced underwater acoustic applications.
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