Foam (inches) dB       Foam (inches)  dB        Foam (inches) dB       Foam (inches)  500Hz	 1000Hz	 1500Hz															
	0	78.3		0	70.6		0	51.6		0	 78.3	 70.6	 51.6												
	2	77.5		2	68.9		2	50.2		2	 77.5	 68.9	 50.2												
	4	76.1		4	67.7		4	48.7		4	 76.1	 67.7	 48.7												
	6	75		6	66.4		6	47.2		6	 75	 66.4	 47.2												
	8	73.9		8	65.7		8	45.9		8	 73.9	 65.7	 45.9												
																									
	500Hz			1000Hz			1500Hz		        Comparison