Questions tagged [noise-cancellation]

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4 votes
4 answers
2k views

Noise reduction using multiple recordings of the same signal

I have two (audio) recordings of one analog signal, I used two separate devices (smart-phones) recording from two different locations. Each recording device is pretty crappy, lot's of electrical hum ...
Reuben Crimp's user avatar
3 votes
1 answer
597 views

Hardware requirements for ambient active noise cancallation system using adaptive LMS

Background I'm working on a hobby project to reduce ambient low-frequency noise generated from HVAC equipment within a small area of a room. The noise is predictable and concentrated between 55Hz and ...
rjacobs's user avatar
  • 211
2 votes
1 answer
261 views

Noise Reduction - noisy lines

I'm trying to reduce the noise in this photo. What type of filters/techniques should I use to cancel out the noise? I've tried using box filter and Gaussian filter to blur out some of the noise, but i ...
adimath's user avatar
  • 39
2 votes
1 answer
786 views

Noise removal using adaptive noise cancellation algorithms in real time systems

I am newbie in signal processing. I want to remove noise from real time audio signal using adaptive noise cancellation(LMS&RLS) algorithms. I don't know how to choose reference signal(noise signal)...
Nandana's user avatar
  • 31
1 vote
1 answer
292 views

Can simple FIR/IIR filtering recover/estimate a signal plagued with low SNR white noise?

I'm trying to design a filter to restore the original signal from strong noise (low SNR). I have tried low pass FIR and it could work well as the amplitude of original signal is much higher than the ...
marcus zhang's user avatar