| http://www.w3.org/ns/prov#value | - More generally, layer 131 of acoustic decoupling material has a nominal thickness equal to an odd integral multiple of one quarter of the wavelength in the acoustic decoupling material of an acoustic wave having a frequency equal to the center frequency of the pass band of transformer 100, i.e., t???(2m+1)??n/4, where t and ??n are as defined above and m is an integer equal to or greater than zero
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