for obtaining desired directional characteristic only

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Details of transducers, > Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purpose H04R5/00) > for obtaining desired directional characteristic only

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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H04R 1/323 CPC only CPC only
H04R 1/326 CPC only CPC only
H04R 1/34 by using a single transducer with sound reflecting, diffracting, directing or guiding means +2 CPC IPC+CPC Available in IPC and CPC
H04R 1/40 by combining a number of identical transducers +2 CPC IPC+CPC Available in IPC and CPC