Benchmark Problems for Acoustical Parameters

Basic: A-11

Find values of reverberation time (T), early decay time (EDT), clarity (C80) and center time (Ts) from following impulse response.

a11.wav (RIFF waveform, 16 bit signed integer, monoral, sampling frequency: 48000 Hz)
a11.fb (floating-point binary (little endian), monoral, sampling frequency: 48000 Hz)
a11_wf

Note

This benchmark's impulse response is modified white noise exponentically to fit about 0.5 second of reverberation time.

Reverberation Time: T (s)

残響時間のグラフ,回帰区間を併記,数機関の結果
125 250 500 1k 2k 4k Regression interval
Okubo 0.580.450.490.510.510.51 -5 ~ -35 dB (T30)
Miyazaki 0.590.450.500.500.500.51 -5 ~ -35 dB (T30)
Hoshi 0.580.450.490.510.510.51 -5 ~ -35 dB (T30)


Early Decay Time (s)

EDT
125 250 500 1k 2k 4k
Okubo 0.380.540.480.570.500.50
Miyazaki 0.370.530.480.580.510.49


Clarity: C80 (dB)

C80
125 250 500 1k 2k 4k
Hoshi 11.809.728.918.098.829.43
Miyazaki 11.238.938.547.428.719.37

*modified on 1st Dec. 2018.

Center time: Ts (s)

Ts
125 250 500 1k 2k 4k
Hoshi 0.0320.0370.0380.0400.0380.036
Miyazaki 0.0390.0420.0400.0420.0380.036
Yairi 0.0330.0340.0380.0420.0350.036

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