Margined Horn-Shaped Air Chamber for Body-Conduction Microphone
The sound amplification ratios of sealed air chambers with different shapes were quantitatively compared to design a body-conduction microphone to measure animal scratching sounds. Recently, quantitative monitoring of scratching intensity in dogs has been required. We have already developed a collar...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-05-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/23/9/4565 |
| _version_ | 1827742596875681792 |
|---|---|
| author | Shun Muramatsu Yuki Kohata Emi Hira Yasuyuki Momoi Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh |
| author_facet | Shun Muramatsu Yuki Kohata Emi Hira Yasuyuki Momoi Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh |
| author_sort | Shun Muramatsu |
| collection | DOAJ |
| description | The sound amplification ratios of sealed air chambers with different shapes were quantitatively compared to design a body-conduction microphone to measure animal scratching sounds. Recently, quantitative monitoring of scratching intensity in dogs has been required. We have already developed a collar with a body-conduction microphone to measure body-conducted scratching sounds. However, the air chamber, one of the components of the body-conduction microphone, has not been appropriately designed. This study compared the amplification ratios of air chambers with different shapes through numerical analysis and experiments. According to the results, the horn-shaped air chamber achieved the highest amplification performance, at least for sound frequencies below 3 kHz. The simulated amplification ratio of the horn-shaped air chamber with a 1 mm height and a 15 mm diameter was 52.5 dB. The deformation of the bottom of the air chamber affected the amplification ratio. Adjusting the margin of the margined horn shape could maintain its amplification ratio at any pressing force. The simulated and experimental amplification ratios of the margined horn-shaped air chamber were 53.4 dB and 19.4 dB, respectively. |
| first_indexed | 2024-03-11T04:06:18Z |
| format | Article |
| id | doaj.art-dab2b0232cae4647a34b9da077ca4d94 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T04:06:18Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-dab2b0232cae4647a34b9da077ca4d942023-11-17T23:46:13ZengMDPI AGSensors1424-82202023-05-01239456510.3390/s23094565Margined Horn-Shaped Air Chamber for Body-Conduction MicrophoneShun Muramatsu0Yuki Kohata1Emi Hira2Yasuyuki Momoi3Michitaka Yamamoto4Seiichi Takamatsu5Toshihiro Itoh6Department of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Faculty of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, JapanDepartment of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanThe sound amplification ratios of sealed air chambers with different shapes were quantitatively compared to design a body-conduction microphone to measure animal scratching sounds. Recently, quantitative monitoring of scratching intensity in dogs has been required. We have already developed a collar with a body-conduction microphone to measure body-conducted scratching sounds. However, the air chamber, one of the components of the body-conduction microphone, has not been appropriately designed. This study compared the amplification ratios of air chambers with different shapes through numerical analysis and experiments. According to the results, the horn-shaped air chamber achieved the highest amplification performance, at least for sound frequencies below 3 kHz. The simulated amplification ratio of the horn-shaped air chamber with a 1 mm height and a 15 mm diameter was 52.5 dB. The deformation of the bottom of the air chamber affected the amplification ratio. Adjusting the margin of the margined horn shape could maintain its amplification ratio at any pressing force. The simulated and experimental amplification ratios of the margined horn-shaped air chamber were 53.4 dB and 19.4 dB, respectively.https://www.mdpi.com/1424-8220/23/9/4565wearable devicecollarscratching soundbody-conducted soundair chamber |
| spellingShingle | Shun Muramatsu Yuki Kohata Emi Hira Yasuyuki Momoi Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh Margined Horn-Shaped Air Chamber for Body-Conduction Microphone Sensors wearable device collar scratching sound body-conducted sound air chamber |
| title | Margined Horn-Shaped Air Chamber for Body-Conduction Microphone |
| title_full | Margined Horn-Shaped Air Chamber for Body-Conduction Microphone |
| title_fullStr | Margined Horn-Shaped Air Chamber for Body-Conduction Microphone |
| title_full_unstemmed | Margined Horn-Shaped Air Chamber for Body-Conduction Microphone |
| title_short | Margined Horn-Shaped Air Chamber for Body-Conduction Microphone |
| title_sort | margined horn shaped air chamber for body conduction microphone |
| topic | wearable device collar scratching sound body-conducted sound air chamber |
| url | https://www.mdpi.com/1424-8220/23/9/4565 |
| work_keys_str_mv | AT shunmuramatsu marginedhornshapedairchamberforbodyconductionmicrophone AT yukikohata marginedhornshapedairchamberforbodyconductionmicrophone AT emihira marginedhornshapedairchamberforbodyconductionmicrophone AT yasuyukimomoi marginedhornshapedairchamberforbodyconductionmicrophone AT michitakayamamoto marginedhornshapedairchamberforbodyconductionmicrophone AT seiichitakamatsu marginedhornshapedairchamberforbodyconductionmicrophone AT toshihiroitoh marginedhornshapedairchamberforbodyconductionmicrophone |