Fast algorithms for blind estimation of reverberation time

Rama Ratnam, Douglas L. Jones, William D. O'Brien

Research output: Contribution to journalLetterpeer-review


The reverberation time (RT) measures the persistence of a sound in enclosed acoustic spaces. In a previous work, a method for the blind maximum-likelihood estimation (MLE) of RT using passively received microphone signals was presented. The procedure overcomes the drawbacks of current methods that use a controlled sound source for RT determination. Here, fast algorithms for online implementation of the method are developed. One algorithm, suitable for a one-time determination of the RT, requires O(N) computations for a data frame of length N. A second IIR algorithm, based on Q-levels of quantization, requires O(Q) computations. Results for speech data and choice of algorithms are discussed.

Original languageEnglish (US)
Pages (from-to)537-540
Number of pages4
JournalIEEE Signal Processing Letters
Issue number6
StatePublished - Jun 2004


  • Acoustic reverberation time
  • Blind estimation
  • Fast algorithms

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics


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