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.

中文翻译：

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使用适合双耳相干性的β分布盲目估计直接与混响比

直接混响比（DRR）的知识在各种声学和音频应用中可能很有用。虽然可以从房间冲激响应（RIR）轻松计算DRR，但是当此类RIR不可用时，需要利用机会进行盲目估计。本文介绍了一种DRR的盲估计方法，该方法包括将β分布拟合到随时间和频率聚集的两个双耳音频信号之间的幅度平方相干性。利用语音与双耳RIR进行卷积的验证实验得出的DRR估算值在-15至+18 dB范围内，DRR的差异恰到好处。