Ambient audio noise remover

134

01:16:01

This simple circuit remove ambient noise by noise phase inversion, the first sine wave generator(green signal)is the noise picked up by a ambient microphone, the second (orange signal)is the audio signal from source, the result blue is the audio signal free of ambient noise.

published 8 years ago

hurz

8 years ago

Would be to easy if noise and audio are coming on different paths. Unfortunately noise and audio is mixed together in the same channel.

LeButch

8 years ago

Ignore Hurz, he is just a troll.

nikisalli

8 years ago

@lebutch i see hurz is helping and you're spamming under the circuits. You look more a troll than @hurz

ambroooooo

8 years ago

With this circuit i don’t want remove the noise mixed with audio signal, i want to remove the ambient noise picked up by a microphone (in this case the noise come in the mixer by another path)and by phase inversion is possible to cancel it.

hurz

8 years ago

Ok, but this is by far more complex in reality. if it would be that easy ... hey hoo. .. only to give you an idea, a microphone does has a frequency and phase characteristic very complex and by far not flat. The same for headphone louspeaker. This all together is extrem complex. Imagine the phase shift in all these thing together with amplifing and processing with a DSP microphone and headphone. If you get 20dB noise reduction, you can be already very very happy! 6dB is also quite good. But do not expect a 100% cancel out of noise!

hurz

7 years ago

Good description update, now its clear 👍

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