Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers
In beamformer design, the microphone array configuration is often prescribed and the filter coefficients are varied in order to improve on the noise reduction performance. However, the positions of the microphone elements play an important role in the overall performance and should be optimized at t...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Institute of Electrical and Electronics Engineers
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/39080 |
| _version_ | 1848755493618581504 |
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| author | Feng, Z. Yiu, Ka Fai Nordholm, Sven |
| author_facet | Feng, Z. Yiu, Ka Fai Nordholm, Sven |
| author_sort | Feng, Z. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In beamformer design, the microphone array configuration is often prescribed and the filter coefficients are varied in order to improve on the noise reduction performance. However, the positions of the microphone elements play an important role in the overall performance and should be optimized at the same time. This problem is addressed in this paper. In order to understand the performance improvement through location movements, we first look at the design with an infinite filter length, which gives the performance limit for finite filter length designs. When the filter length is finite, both the filter coefficients and the placement of the microphone array are decision variables. In both situations, the problems can be formulated as constrained optimization problems. As the filter length increases, we show that the performance converges quickly to the limit. For illustration, two numerical examples are solved. Comparing with several popular configurations, we show that the performance of the optimized configuration improves significantly. |
| first_indexed | 2025-11-14T08:57:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-39080 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:57:11Z |
| publishDate | 2012 |
| publisher | Institute of Electrical and Electronics Engineers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-390802018-03-29T09:07:34Z Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers Feng, Z. Yiu, Ka Fai Nordholm, Sven In beamformer design, the microphone array configuration is often prescribed and the filter coefficients are varied in order to improve on the noise reduction performance. However, the positions of the microphone elements play an important role in the overall performance and should be optimized at the same time. This problem is addressed in this paper. In order to understand the performance improvement through location movements, we first look at the design with an infinite filter length, which gives the performance limit for finite filter length designs. When the filter length is finite, both the filter coefficients and the placement of the microphone array are decision variables. In both situations, the problems can be formulated as constrained optimization problems. As the filter length increases, we show that the performance converges quickly to the limit. For illustration, two numerical examples are solved. Comparing with several popular configurations, we show that the performance of the optimized configuration improves significantly. 2012 Journal Article http://hdl.handle.net/20.500.11937/39080 10.1109/TSP.2011.2178491 Institute of Electrical and Electronics Engineers restricted |
| spellingShingle | Feng, Z. Yiu, Ka Fai Nordholm, Sven Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title | Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title_full | Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title_fullStr | Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title_full_unstemmed | Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title_short | Placement Design of Microphone Arrays in Near-Field Broadbank Beamformers |
| title_sort | placement design of microphone arrays in near-field broadbank beamformers |
| url | http://hdl.handle.net/20.500.11937/39080 |