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Updated: Dec 2, 2025

A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
Blind estimation of the direct-to-reverberant ratio using a beta distribution fit to binaural coherence
Paul Calamia1, Nava Balsam1, Philip Robinson1
1Facebook Reality Labs Research, Redmond, Washington 98052, USApcalamia@fb.com, nava@fb.com, philrob22@fb.com.
Abstract:
Knowledge of the direct-to-reverberant ratio (DRR) can be useful in various acoustic and audio applications. While the DRR can be computed easily from a room impulse response (RIR), blind estimation using sources of opportunity is necessary when such RIRs are not available. This paper describes a method for blind estimation of the DRR which involves fitting a beta distribution to the magnitude-squared coherence between two binaural audio signals, aggregated over time and frequency. Validation experiments utilizing speech convolved with binaural RIRs yield DRR estimates that are within the just-noticeable difference for DRRs in the range -15 to +18 dB.
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