An Optimization Method for Maximizing the Low Frequency Sound Insulation of Plate Structures

Table 1

Reference sound insulation contours for calculation of single-number ratings.

Frequency (Hz)	20	25	31.5	40	50	63	80	100	125	160	200	250
Values of Reference for (dB)	-17	-10	-3	4	0	-3	-7	-3	0	4	2	0
Values of Reference for (dB)	-6	-4	-3	-2	-1	-1	-1	0	0	0	0	0