Tonpilz-type vector sensor for the estimation of underwater sound wave direction

2018 ◽  
Vol 144 (5) ◽  
pp. 2801-2810
Author(s):  
Yongrae Roh ◽  
Youngsub Lim
Keyword(s):  
Sound Wave ◽  
Underwater Sound ◽  
Wave Direction ◽  
Vector Sensor

scholarly journals Spiral Sound Wave Transducer Based on the Longitudinal Vibration

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3674 ◽  
Author(s):  
Wei Lu ◽  
Yu Lan ◽  
Rongzhen Guo ◽  
Qicheng Zhang ◽  
Shichang Li ◽  
...  
Keyword(s):  
Sound Wave ◽  
Longitudinal Vibration ◽  
Three Dimensional ◽  
Low Frequency ◽  
Sound Field ◽  
Field Measurements ◽  
Sound Waves ◽  
Underwater Sound ◽  
Three Dimensional Finite Element ◽  
Wave Transducer

A spiral sound wave transducer comprised of longitudinal vibrating elements has been proposed. This transducer was made from eight uniform radial distributed longitudinal vibrating elements, which could effectively generate low frequency underwater acoustic spiral waves. We discuss the production theory of spiral sound waves, which could be synthesized by two orthogonal acoustic dipoles with a phase difference of 90 degrees. The excitation voltage distribution of the transducer for emitting a spiral sound wave and the measurement method for the transducer is given. Three-dimensional finite element modeling (FEM)of the transducer was established for simulating the vibration modes and the acoustic characteristics of the transducers. Further, we fabricated a spiral sound wave transducer based on our design and simulations. It was found that the resonance frequency of the transducer was 10.8 kHz and that the transmitting voltage resonance was 140.5 dB. The underwater sound field measurements demonstrate that our designed transducer based on the longitudinal elements could successfully generate spiral sound waves.

Simulation of Acoustic Field for Megasonic Bath Cleaning in Advanced Semiconductor Manufacturing

2013 ◽  
Vol 289 ◽  
pp. 81-86
Author(s):  
Ya Ting Huang ◽  
Xiu Ping Dong
Keyword(s):  
Acoustic Field ◽  
Sound Wave ◽  
Semiconductor Manufacturing ◽  
Semiconductor Industry ◽  
Wave Direction ◽  
Megasonic Cleaning ◽  
Local Areas ◽  
Small Structure ◽  
Wafer Surfaces

Megasonic cleaning has been one of the most successful techniques for nanoparticle cleaning in semiconductor industry. However, the megasonic energy often causes a pattern collapse and some damage to very small structure. In this study, the distribution of sonic pressure in a wet cleaning bath with different arrangement of megasonic transducers is simulated. Megasonic wave transmits directional and will be disturbed. Thus the wafer surfaces should be arranged parallel to the sound wave direction of propagation. Convergence gain in the whole cleaning space is limited but results in great variance in local areas. Thus the wafer moving, rotating and oscillating is necessary.

scholarly journals A Review on Puerulus (Panulirus spp.) Resource Utilization in Indonesia Based on the Sense of Hearing: Auditory Receptor Organs

2021 ◽  
Vol 13 (2) ◽  
pp. 255
Author(s):  
Hari Subagio ◽  
Evron Asrial ◽  
Yusnaini Yusnaini ◽  
Nurul Rosana ◽  
Gatut Bintoro ◽  
...  
Keyword(s):  
Sound Wave ◽  
The Body ◽  
First Year ◽  
Natural Mortality ◽  
Sound Waves ◽  
Underwater Sound ◽  
Fish Resources ◽  
Surrounding Environment ◽  
Auditory Receptor ◽  
Compression And Expansion

Highlight ResearchThe mortality of lobster seeds by predators in the first year is 96.0-99.4%It takes technology to catch seeds before being eaten by predatorsApplication of sound wave-based attractor technology to lobstersDo lobsters have the ability to hear sound waves?The lobster's sense of hearing begins to function from the puerulus stage AbstractIndonesia is a country that produces abundant lobster seeds (puerulus), however, there is a paradox, where natural mortality in the first year since entering the settlement phase can reach 96.0-99.4%. The use of lobster resources, especially in the puerulus stage, for cultivation, is very strategic. Therefore, it is necessary to improve puerulus fishing technology. In the capture fisheries sector, the use of the sense of hearing in fish resources has been carried out to increase catch productivity, by utilizing sound wave-based attractors’ technology. For lobster resources, to what extent is this technology applicable? Underwater sound waves are a phenomenon of compression and expansion of a medium as sound energy passes through it. This aspect of the study is still new and very prospective. The purpose of this review article is to answer some basic questions: Can lobsters be able to hear sounds that come from their surroundings, since when do lobsters sense of hearing begin to function, and anatomically what kind of auditory organs are in lobsters. The results of the review conclude as follows: lobsters have senses that are able to perceive or listen to sound waves (sound) from their surrounding environment, this ability has been possessed by lobsters since they were in the postlarva or puerulus stage. Anatomically, the organs that act as the sense of hearing in lobsters are: receptors on the body surface, chordotonal organs and statocyst organs.

scholarly journals A Fundamental Study on Sound-wave Direction During Acoustic Rhinometry of the Nasal Cavity

2004 ◽  
Vol 43 (2) ◽  
pp. 154-160
Author(s):  
Shoji Saito ◽  
Kensei Naito ◽  
Chikashi Ito ◽  
Hideya Mimura ◽  
Toshiko Mamiya
Keyword(s):  
Nasal Cavity ◽  
Sound Wave ◽  
Acoustic Rhinometry ◽  
Wave Direction ◽  
Fundamental Study
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