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IPC Subgroup
H04R 1/2

Arrangements for obtaining desired frequency or directional characteristics

Introduced: September 1968

Last revised: January 2006

Full Title

Details of transducers > Arrangements for obtaining desired frequency or directional characteristics

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS

Scope Notes

Limiting references: Arrangements for obtaining desired frequency or directional characteristics for stereophonic purposes

2 direct subcodes

Child Classifications

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