A hybrid descent method with genetic algorithm for microphone array placement design

Zhibao Li, Ka Fai Cedric Yiu, Zhiguo Feng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


In beamformer design, the microphone locations are often fixed and only 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. However, this nonlinear optimization problem is non-convex and local search techniques might not yield the best result. This problem is addressed in this paper. A hybrid descent method is proposed which consists of a genetic algorithm together with a gradient-based method. The gradient-based method can help to locate the optimal solution rapidly around the start point, while the genetic algorithm is used to jump out from local minima. This hybrid method has the descent property and can help us to find the optimal placement for better beamformer design. Numerical examples are provided to demonstrate the effectiveness of the method.
Original languageEnglish
Pages (from-to)1486-1490
Number of pages5
JournalApplied Soft Computing Journal
Issue number3
Publication statusPublished - 1 Jan 2013


  • Beamformer design
  • Genetic algorithm
  • Hybrid descent method
  • Microphone array
  • Microphone placement

ASJC Scopus subject areas

  • Software

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