CPC Subgroup
H04R 1/28 Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
Full Title
Details of transducers, > Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purpose H04R5/00) > for obtaining desired frequency characteristic only > Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
3 direct subcodes
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