Fast Sound Source Localization Using Two-Level Search Space Clustering

Dongsuk Yook, Taewoo Lee, Youngkyu Cho

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


Steered response power phase transform (SRP-PHAT) is a method that is widely used for robust sound source localization (SSL). However, since SRP-PHAT searches over a large number of candidate locations, it is too slow to run in real-time for large-scale microphone array systems. In this paper, we propose a robust two-level search space clustering method to speed-up SRP-PHAT-based SSL. The proposed method divides the candidate locations of the sound source into a set of groups and finds a small number of groups that are likely to contain the maximum power location. By searching within the small number of groups, the computational costs are reduced by 61.8% compared to a previously proposed method without loss of accuracy.

Original languageEnglish
Article number7039285
Pages (from-to)20-26
Number of pages7
JournalIEEE Transactions on Cybernetics
Issue number1
Publication statusPublished - 2016 Jan

Bibliographical note

Publisher Copyright:
© 2015 IEEE.


  • Search space clustering (SSC)
  • Sound source localization (SSL)
  • Steered response power phase transform (SRP-PHAT)

ASJC Scopus subject areas

  • Software
  • Control and Systems Engineering
  • Information Systems
  • Human-Computer Interaction
  • Computer Science Applications
  • Electrical and Electronic Engineering


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