CPC Main Group Additional Only
H04R 2217/00 Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
2 direct subcodes
Child Classifications
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- H04R 2217/01 Non-planar magnetostrictive, piezoelectric or electrostrictive benders
- H04R 2217/03 Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves