for obtaining desired directional characteristic only

Introduced: September 1968

Last revised: January 2006

Full Title

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

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

Application references: Arrangements in electric hearing aids for obtaining desired directional characteristic

2 direct subcodes

Child Classifications

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H04R 1/34 by using a single transducer with sound reflecting, diffracting, directing or guiding means
H04R 1/4 by combining a number of identical transducers