H04R 3/00
Definition Statement
This place covers:Circuits for transducers, e.g.
- motional feedback or like circuit arrangements for transducers
- circuits for combining the signals of two or more microphones
- protection circuits for transducers
- circuits for preventing acoustic reaction
- circuits for distributing a signal to two or more loudspeakers
- circuits for correcting the frequency response of transducers
References
Limiting references
This place does not cover:Arrangements for producing a reverberation or echo sound
| G10K 15/08 |
Amplifiers
| H03F |
Application-oriented references
Circuits for combining the signals of two or more microphones or loudspeakers specially adapted for hearing aids
| H04R 25/00 |
Informative references
Control of amplification
| H03G |
Arrangements for preventing acoustic feedback
| H04M 1/20 |
Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
| H04M 9/08 |
Circuits for stereophonic arrangements
| H04R 5/04 |
Stereophonic systems
| H04S |