Table 4.

Subjective comfort evaluations of four sound environments

	Quiet	Red noise	Pink noise	White noise
Mean	−0.26	0.53	0.25	−0.61
Median	0	0	0	−1
Std. deviation	0.51	0.92	0.67	0.82
Variance	0.26	0.84	0.45	0.67
Minimum	−2	−1	−1	−3
Maximum	0	3	2	1