Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor
Abstract Differential beamforming, with its compact size and high directivity factor (DF), offers significant advantages for addressing various acoustic problems. While white noise gain (WNG) serves as a fundamental performance criterion for the robustness of differential microphone arrays (DMAs), s...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-90992-3 |
| _version_ | 1826560235681087488 |
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| author | Pu Zheng Yongfeng Zhi |
| author_facet | Pu Zheng Yongfeng Zhi |
| author_sort | Pu Zheng |
| collection | DOAJ |
| description | Abstract Differential beamforming, with its compact size and high directivity factor (DF), offers significant advantages for addressing various acoustic problems. While white noise gain (WNG) serves as a fundamental performance criterion for the robustness of differential microphone arrays (DMAs), simultaneously achieving both high WNG and frequency-invariant DF remains a significant challenge. This study presents a new method for the design of nonuniform linear robust DMAs. Our method effectively eliminates high-frequency extra nulls in the mainlobe of robust DMAs, thus preserving robustness and ensuring both frequency-invariant DF and consistent mainlobe width. The proposed approach achieves a WNG comparable to the maximum WNG method while mitigating its shortcomings in high-frequency, frequency-dependent variations of mainlobe width and DF, demonstrating its potential to enhance acoustic performance in complex environments. |
| first_indexed | 2025-03-14T09:13:04Z |
| format | Article |
| id | doaj.art-6b59b6746a18478eb23ff3ab6f804722 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2025-03-14T09:13:04Z |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-6b59b6746a18478eb23ff3ab6f8047222025-03-02T12:21:31ZengNature PortfolioScientific Reports2045-23222025-02-0115111510.1038/s41598-025-90992-3Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factorPu Zheng0Yongfeng Zhi1School of Automation, Northwestern Polytechnical UniversitySchool of Automation, Northwestern Polytechnical UniversityAbstract Differential beamforming, with its compact size and high directivity factor (DF), offers significant advantages for addressing various acoustic problems. While white noise gain (WNG) serves as a fundamental performance criterion for the robustness of differential microphone arrays (DMAs), simultaneously achieving both high WNG and frequency-invariant DF remains a significant challenge. This study presents a new method for the design of nonuniform linear robust DMAs. Our method effectively eliminates high-frequency extra nulls in the mainlobe of robust DMAs, thus preserving robustness and ensuring both frequency-invariant DF and consistent mainlobe width. The proposed approach achieves a WNG comparable to the maximum WNG method while mitigating its shortcomings in high-frequency, frequency-dependent variations of mainlobe width and DF, demonstrating its potential to enhance acoustic performance in complex environments.https://doi.org/10.1038/s41598-025-90992-3Differential microphone arrays (DMAs)Robust DMAsWhite noise gainDirectivity factor |
| spellingShingle | Pu Zheng Yongfeng Zhi Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor Scientific Reports Differential microphone arrays (DMAs) Robust DMAs White noise gain Directivity factor |
| title | Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor |
| title_full | Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor |
| title_fullStr | Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor |
| title_full_unstemmed | Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor |
| title_short | Robust differential microphone array with constant mainlobe width and frequency-invariant directivity factor |
| title_sort | robust differential microphone array with constant mainlobe width and frequency invariant directivity factor |
| topic | Differential microphone arrays (DMAs) Robust DMAs White noise gain Directivity factor |
| url | https://doi.org/10.1038/s41598-025-90992-3 |
| work_keys_str_mv | AT puzheng robustdifferentialmicrophonearraywithconstantmainlobewidthandfrequencyinvariantdirectivityfactor AT yongfengzhi robustdifferentialmicrophonearraywithconstantmainlobewidthandfrequencyinvariantdirectivityfactor |