Wind noise reduction for a closely spaced microphone array in a car environment
Abstract This work studies a wind noise reduction approach for communication applications in a car environment. An endfire array consisting of two microphones is considered as a substitute for an ordinary cardioid microphone capsule of the same size. Using the decomposition of the multichannel Wiene...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-07-01
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| Series: | EURASIP Journal on Audio, Speech, and Music Processing |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13636-018-0130-z |
| _version_ | 1811334024131510272 |
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| author | Simon Grimm Jürgen Freudenberger |
| author_facet | Simon Grimm Jürgen Freudenberger |
| author_sort | Simon Grimm |
| collection | DOAJ |
| description | Abstract This work studies a wind noise reduction approach for communication applications in a car environment. An endfire array consisting of two microphones is considered as a substitute for an ordinary cardioid microphone capsule of the same size. Using the decomposition of the multichannel Wiener filter (MWF), a suitable beamformer and a single-channel post filter are derived. Due to the known array geometry and the location of the speech source, assumptions about the signal properties can be made to simplify the MWF beamformer and to estimate the speech and noise power spectral densities required for the post filter. Even for closely spaced microphones, the different signal properties at the microphones can be exploited to achieve a significant reduction of wind noise. The proposed beamformer approach results in an improved speech signal regarding the signal-to-noise-ratio and keeps the linear speech distortion low. The derived post filter shows equal performance compared to known approaches but reduces the effort for noise estimation. |
| first_indexed | 2024-04-13T17:01:36Z |
| format | Article |
| id | doaj.art-a59a3be1f16f4f5bb9918687570ecba3 |
| institution | Directory Open Access Journal |
| issn | 1687-4722 |
| language | English |
| last_indexed | 2024-04-13T17:01:36Z |
| publishDate | 2018-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Audio, Speech, and Music Processing |
| spelling | doaj.art-a59a3be1f16f4f5bb9918687570ecba32022-12-22T02:38:39ZengSpringerOpenEURASIP Journal on Audio, Speech, and Music Processing1687-47222018-07-01201811910.1186/s13636-018-0130-zWind noise reduction for a closely spaced microphone array in a car environmentSimon Grimm0Jürgen Freudenberger1Institute for System Dynamics, HTWG Konstanz, University of Applied SciencesInstitute for System Dynamics, HTWG Konstanz, University of Applied SciencesAbstract This work studies a wind noise reduction approach for communication applications in a car environment. An endfire array consisting of two microphones is considered as a substitute for an ordinary cardioid microphone capsule of the same size. Using the decomposition of the multichannel Wiener filter (MWF), a suitable beamformer and a single-channel post filter are derived. Due to the known array geometry and the location of the speech source, assumptions about the signal properties can be made to simplify the MWF beamformer and to estimate the speech and noise power spectral densities required for the post filter. Even for closely spaced microphones, the different signal properties at the microphones can be exploited to achieve a significant reduction of wind noise. The proposed beamformer approach results in an improved speech signal regarding the signal-to-noise-ratio and keeps the linear speech distortion low. The derived post filter shows equal performance compared to known approaches but reduces the effort for noise estimation.http://link.springer.com/article/10.1186/s13636-018-0130-zMVDR beamformingMultichannel Wiener filterWind noise reductionSpeech signal processingMEMS microphones |
| spellingShingle | Simon Grimm Jürgen Freudenberger Wind noise reduction for a closely spaced microphone array in a car environment EURASIP Journal on Audio, Speech, and Music Processing MVDR beamforming Multichannel Wiener filter Wind noise reduction Speech signal processing MEMS microphones |
| title | Wind noise reduction for a closely spaced microphone array in a car environment |
| title_full | Wind noise reduction for a closely spaced microphone array in a car environment |
| title_fullStr | Wind noise reduction for a closely spaced microphone array in a car environment |
| title_full_unstemmed | Wind noise reduction for a closely spaced microphone array in a car environment |
| title_short | Wind noise reduction for a closely spaced microphone array in a car environment |
| title_sort | wind noise reduction for a closely spaced microphone array in a car environment |
| topic | MVDR beamforming Multichannel Wiener filter Wind noise reduction Speech signal processing MEMS microphones |
| url | http://link.springer.com/article/10.1186/s13636-018-0130-z |
| work_keys_str_mv | AT simongrimm windnoisereductionforacloselyspacedmicrophonearrayinacarenvironment AT jurgenfreudenberger windnoisereductionforacloselyspacedmicrophonearrayinacarenvironment |