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Analysis of room acoustics
Different methods and techniques can be adopted to characterize room acoustics for the study of distant-speech interaction.The most relevant information is the impulse response between two points in space, i.e., the sound source position and the microphone position. The impulse response depends on several factors and can be estimated or simulated in different ways. Both early and late reflections, which determine the structure of the impulse response, contribute to the reverberation effects that typically hamper the distant-speech recognition task. Simulation methods based on contamination of clean speech can be used to generate realistic signals, having characteristics similar to those observed in a real reverberant environment.
Related keywords: Reverberation time (T60), Direct-to-reverberation ratio, Reverberation tail, Impulse response measurement, Analysis of acoustic reflections, Room geometry inference, Early/late reflections, Multi-path propagation, Room geometry, Critical distance, Image method, Reflection coefficient.