Evaluation of Reverberation Time Based on a Sound Level Residual Error Least-Squares Nonlinear Regression Approach
Sheng Sheng-wo · Journal of Tongji University · 2007
The paper proposes a nonlinear regression approach with sound level residual error least-squares for evaluating reverberation times,when reverberation decay curves are obtained by the backward integration of room impulse responses.The analysis shows that this method makes full use of the measured data of the impulse response from start to finish.The influences of the signal-to-noise ratio and the integration limit on reverberation times evaluation are weakened,and a minimum statistical standard deviation and 95% probability confidence interval are obtained.The deviated evaluation caused by either the low signal-to-noise ratio or the careless choice of the integration limit is avoided,and a precisive reverberation time evaluation is achieved.