IPC Definitions - January 01, 2012

H04B 11/00 - Definition fr

Definition statement

This main group covers:

Transmission systems employing ultrasonic, sonic or infrasonic waves.

Informative references

Attention is drawn to the following places, which may be of interest for search:

Speech analysis or synthesis; Speech recognition

G10L

Telephonic communication

H04M

Loudspeakers, microphones or like acoustic electromechanical transducers

H04R

Stereophonic systems

H04S