A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network
In this research, we proposed a miniaturized two-element sensor array inspired by Ormia Ochracea for sound direction finding applications. In contrast to the convectional approach of using mechanical coupling structures for enlarging the intensity differences, we exploited an electrical coupling net...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/16/3469 |
| _version_ | 1798025812535934976 |
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| author | Chien-Chang Huang Chien-Hao Liu |
| author_facet | Chien-Chang Huang Chien-Hao Liu |
| author_sort | Chien-Chang Huang |
| collection | DOAJ |
| description | In this research, we proposed a miniaturized two-element sensor array inspired by Ormia Ochracea for sound direction finding applications. In contrast to the convectional approach of using mechanical coupling structures for enlarging the intensity differences, we exploited an electrical coupling network circuit composed of lumped elements to enhance the phase differences and extract the optimized output power for good signal-to-noise ratio. The separation distance between two sensors could be reduced from 0.5 wavelength to 0.1 wavelength 3.43 mm at the operation frequency of 10 kHz) for determining the angle of arrivals. The main advantages of the proposed device include low power losses, flexible designs, and wide operation bandwidths. A prototype was designed, fabricated, and experiments examined within a sound anechoic chamber. It was demonstrated that the proposed device had a phase enhancement of 110<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>°</mo> </msup> </semantics> </math> </inline-formula> at the incident angle of 90<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>°</mo> </msup> </semantics> </math> </inline-formula> and the normalized power level of −2.16 dB at both output ports. The received power levels of our device were 3 dB higher than those of the transformer-type direction-finding system. In addition, our proposed device could operate in the frequency range from 8 kHz to 12 kHz with a tunable capacitor. The research results are expected to be beneficial for the compact sonar or radar systems. |
| first_indexed | 2024-04-11T18:24:56Z |
| format | Article |
| id | doaj.art-09a54e65904247ebb591109df59ec140 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:24:56Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-09a54e65904247ebb591109df59ec1402022-12-22T04:09:39ZengMDPI AGSensors1424-82202019-08-011916346910.3390/s19163469s19163469A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling NetworkChien-Chang Huang0Chien-Hao Liu1Department of Mechanical Engineering, National Taiwan University, Taipei 10617, TaiwanDepartment of Mechanical Engineering, National Taiwan University, Taipei 10617, TaiwanIn this research, we proposed a miniaturized two-element sensor array inspired by Ormia Ochracea for sound direction finding applications. In contrast to the convectional approach of using mechanical coupling structures for enlarging the intensity differences, we exploited an electrical coupling network circuit composed of lumped elements to enhance the phase differences and extract the optimized output power for good signal-to-noise ratio. The separation distance between two sensors could be reduced from 0.5 wavelength to 0.1 wavelength 3.43 mm at the operation frequency of 10 kHz) for determining the angle of arrivals. The main advantages of the proposed device include low power losses, flexible designs, and wide operation bandwidths. A prototype was designed, fabricated, and experiments examined within a sound anechoic chamber. It was demonstrated that the proposed device had a phase enhancement of 110<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>°</mo> </msup> </semantics> </math> </inline-formula> at the incident angle of 90<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>°</mo> </msup> </semantics> </math> </inline-formula> and the normalized power level of −2.16 dB at both output ports. The received power levels of our device were 3 dB higher than those of the transformer-type direction-finding system. In addition, our proposed device could operate in the frequency range from 8 kHz to 12 kHz with a tunable capacitor. The research results are expected to be beneficial for the compact sonar or radar systems.https://www.mdpi.com/1424-8220/19/16/3469biomimetic miniaturized microphone arraysound direction findingsonarcoupling networkOrmia Ochracea |
| spellingShingle | Chien-Chang Huang Chien-Hao Liu A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network Sensors biomimetic miniaturized microphone array sound direction finding sonar coupling network Ormia Ochracea |
| title | A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network |
| title_full | A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network |
| title_fullStr | A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network |
| title_full_unstemmed | A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network |
| title_short | A Biomimetic Miniaturized Microphone Array for Sound Direction Finding Applications Based on a Phase-Enhanced Electrical Coupling Network |
| title_sort | biomimetic miniaturized microphone array for sound direction finding applications based on a phase enhanced electrical coupling network |
| topic | biomimetic miniaturized microphone array sound direction finding sonar coupling network Ormia Ochracea |
| url | https://www.mdpi.com/1424-8220/19/16/3469 |
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