Comparison of psychoacoustic-based reverberance parameters

Area of Science:

• Acoustics
• Psychoacoustics
• Signal Processing

Background:

• Reverberation is a key acoustic parameter influencing sound quality.
• Traditional metrics like Reverberation Time (RT) and Early Decay Time (EDT) have limitations in capturing perceived reverberance.
• Psychoacoustic parameters offer a potentially more accurate assessment of auditory experience.

Purpose of the Study:

• To compare the effectiveness of psychoacoustic reverberance parameters (T_N, EDT_N, P_REV) against RT and EDT.
• To evaluate these parameters under diverse acoustic conditions, including varying sound pressure levels (SPLs) and reverberation times.
• To determine the optimal psychoacoustic parameter for different audio samples (speech, music) and perceptual tasks (relative vs. absolute reverberance estimation).

Main Methods:

• Comparison of psychoacoustic parameters (T_N, EDT_N, P_REV) with RT and EDT.
• Evaluation across a wide range of SPLs (20-100 dB) and RTs (0.5-5.0 s).
• Cross-validation using two sets of subjective data from prior studies.

Main Results:

• Psychoacoustic parameters demonstrated a closer match to perceived reverberance than RT and EDT.
• The performance of psychoacoustic parameters was dependent on SPL range, audio sample type, and reverberation conditions.
• P_REV excelled at estimating relative reverberance changes within narrow SPL ranges.
• EDT_N proved effective for estimating absolute reverberance.

Conclusions:

• Psychoacoustic parameters offer improved estimation of perceived reverberance compared to traditional metrics.
• P_REV is recommended for assessing relative reverberance differences, particularly in speech.
• EDT_N is suggested for evaluating absolute reverberance, especially in music.
• The choice of parameter should consider the specific acoustic context and audio material.