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Table 1 Information about the four test rooms

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

Room type

Room size (m)

Volume (m3)

Temperature (°C)

T 60

(s)

Length

Width

Height

Anechoic chamber

8.4

7.2

6.0

363

22.7

< 0.08

Small classroom

8.5

7.5

3.2

204

23.2

0.65

Large classroom

12.0

9.0

3.2

346

23.4

1.39

Hall

16.5

11.5

9.0

1708

22.8

3.57