Benchmark Problems for Acoustical Parameters

Basic: A-13

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

a13.wav (RIFF waveform, 16 bit signed integer, monoral, sampling frequency: 48000 Hz)
a13.fb (floating-point binary (little endian), 288000 data, monoral, sampling frequency: 48000 Hz)
a13_wf

Note

This benchmark's impulse response is modified white noise to decay the energy exponentially and to fit about 3.0 second 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 3.003.012.882.982.973.01 -5 ~ -35 dB (T30)
Yasuda 3.003.012.882.982.983.01 -5 ~ -35 dB (T30)
Miyazaki 2.993.022.882.972.983.01 -5 ~ -35 dB (T30)
Yairi 3.042.922.902.982.973.00 -5 ~ -35 dB (T30)


Early Decay Time: EDT (s)

EDT
125 250 500 1k 2k 4k
Okubo 3.072.883.192.943.033.05
Yasuda 3.072.883.192.943.033.05
Miyazaki 3.202.873.212.943.053.06


Clarity: C80 (dB)

C80
125 250 500 1k 2k 4k
Hoshi -2.43-2.45-3.57-4.36-3.82-3.47
Miyazaki -2.35-2.55-3.47-4.32-3.79-3.49


Center Time: Ts (s)

Ts
125 250 500 1k 2k 4k
Hoshi 0.2280.2020.2240.2240.2250.223
Miyazaki 0.2320.2100.2250.2240.2220.223
Yairi 0.2100.2190.2190.2170.2220.223

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