Broadband MEMS Microphone Arrays with Reduced Aperture Through 3D-Printed Waveguides
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916283503607808 |
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| author | Laurijssen, Dennis Daems, Walter Steckel, Jan |
| author_facet | Laurijssen, Dennis Daems, Walter Steckel, Jan |
| contents | In this paper we present a passive and cost-effective method for increasing the frequency range of ultrasound MEMS microphone arrays when using beamforming techniques. By applying a 3D-printed construction that reduces the acoustic aperture of the MEMS microphones we can create a regularly spaced microphone array layout with much smaller inter-element spacing than could be accomplished on a printed circuit board due to the physical size of the MEMS elements. This method allows the use of ultrasound sensors incorporating microphone arrays in combination with beamforming techniques without aliases due to grating lobes in applications such as sound source localization or the emulation of bat HRTFs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_07663 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Broadband MEMS Microphone Arrays with Reduced Aperture Through 3D-Printed Waveguides Laurijssen, Dennis Daems, Walter Steckel, Jan Systems and Control Robotics Sound Audio and Speech Processing In this paper we present a passive and cost-effective method for increasing the frequency range of ultrasound MEMS microphone arrays when using beamforming techniques. By applying a 3D-printed construction that reduces the acoustic aperture of the MEMS microphones we can create a regularly spaced microphone array layout with much smaller inter-element spacing than could be accomplished on a printed circuit board due to the physical size of the MEMS elements. This method allows the use of ultrasound sensors incorporating microphone arrays in combination with beamforming techniques without aliases due to grating lobes in applications such as sound source localization or the emulation of bat HRTFs. |
| title | Broadband MEMS Microphone Arrays with Reduced Aperture Through 3D-Printed Waveguides |
| topic | Systems and Control Robotics Sound Audio and Speech Processing |
| url | https://arxiv.org/abs/2406.07663 |