Table 1.

Results of the ISL detection and ISL interpolation tests

ISL detection test (dB SPL)		ISL interpolation test (dB SPL)
Actual SL	Detected SL	Input SL	Output volume
90	90.19	87	87.26
85	85.30	83	83.82
80	81.59	77	79.73
75	78.49	73	76.09
70	72.50	67	68.16
65	65.27	63	63.27
60	60.27	-	-

Error rate for ISL detection test and ISL interpolation test was in the range of 0.2%–4.6% and 0.3%–4.2%, respectively.

ISL, input sound level; SPL, sound pressure level; SL, sound level.