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EP0558312A1 - Adaptive noise reduction circuit for a sound ...
https://patents.google.com/patent/EP0558312A1/en#:~:text=A%20noise%20reduction%20circuit%20for%20a%20hearing%20aid,as%20a%20funtion%20of%20an%20expected%20noise%20environment.
US4441084A - Noise reduction circuit - Google Patents
https://patents.google.com/patent/US4441084A/en
a noise reduction circuit for use in an audio signal recording/reproducing apparatus is comprised of a first signal path including a voltage-controlled amplifier for amplifying a signal supplied...
Stereo Noise Reduction Circuit - ElectroSchematics.com
https://www.electroschematics.com/noise-reduction-circuit-diagram/
Received by Email. The noise reduction circuit is based on the observation that noise is always disturbing in intervals when music stops. It will attenuate the signal output by about 45 dB, when the musical signal input is null or very weak. If the musical signal begins to increase, the attenuation will decrease proportionally reaching the value of 0 dB during normal or strong …
Dynamic Noise Reduction Circuit (DNR) - Peter Vis
https://www.petervis.com/electronics%20guides/dynamic%20noise%20reduction/dynamic%20noise%20reduction.html
Dynamic Noise Reduction (DNR) is a method of removing noise from an audio signal, because any media that stores signals in analogue format is usually prone to such noise issues. An audio magnetic tape that stores data on grains of magnetic particles may exhibit noise after a few years. This noise may be due to the tape wearing out or perhaps damage due to heat, which …
EP0558312A1 - Adaptive noise reduction circuit for a …
https://patents.google.com/patent/EP0558312A1/en
A noise reduction circuit for a hearing aid having an adaptive filter for producing a signal which estimates the noise components present in an input signal. The circuit includes a second filter...
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