librispeech/dev_clean/analyze_result_brief

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P75 dur: 9.270 s (wav_id: 6241-66616-0000)
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min dur: 1.445 s (wav_id: 3081-166546-0073)
avg dur: 7.176 s
std dur: 4.695
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std txt_length: 73.934
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min speed: 2.076 char/s (wav_id: 3081-166546-0073)
avg speed: 14.872 char/s
std speed: 2.786
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max leading_sil: 672.000 ms (wav_id: 8297-275156-0010)
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avg leading_sil: 347.466 ms
std leading_sil: 165.761
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avg trailing_sil: 310.043 ms
std trailing_sil: 169.177