Study on Sound Absorption Properties of Polyvinyl Chloride (PVC) Film Multicavity Structure Materials

Table 4

Comparison of the resonance frequency theory and experimental results of the PB structure.

Structure	Sample thickness, h (m)	Experimental results (Hz)	Before revision		After revision
			Calculation results (Hz)	Error absolute value (Hz)	Calculation results (Hz)	Error absolute value (Hz)
PB	0.01	>1600	1655	—	1655	—
	0.015	1382	1351	29	1351	29
	0.02	1174	1170	4	1170	4
	0.025	1020	1046	26	1046	26
	0.03	746	956	210	733	13
	0.035	656	884	228	661	5
	0.04	600	827	227	604	4
	0.045	560	780	220	557	3
	0.05	510	740	230	517	7