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EURASIP Journal on Audio, Speech, and Music Processing

Table 2 Evaluation standards of STI values according to ICE 60268-16

From: Speech intelligibility improvement in noisy reverberant environments based on speech enhancement and inverse filtering

STI value

Subjective intelligibility impression

0.75–1.00

Excellent

0.60–0.75

Good

0.45–0.60

Satisfactory

0.30–0.45

Poor

0.00–0.30

Very poor

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