Audio Noise Remover
Reduce background hiss, fan and AC noise and 50 Hz electrical hum from voice recordings, using a noise sample you choose.
About Audio Noise Remover
Mishra World Audio Noise Remover cleans up voice recordings, online class audio, interviews and voice-overs. Select a short part where only the background is heard, or let the tool find the quietest part, and it learns that noise at every frequency. It then lowers those frequencies whenever they are not louder than the noise, which reduces steady hiss, fan, cooler and AC noise.
A buzz from electrical wiring is removed separately with notch filters at 50 Hz, the mains frequency in India, or 60 Hz, and their harmonics. A rumble filter cuts low thumps. Compare the original and the cleaned audio, adjust the reduction, and export MP3 or WAV. Everything happens in your browser, so private recordings stay on your device.
How to use Audio Noise Remover
- Drop a recording (or try the noisy sample).
- Select a short part with only background noise — or click Find quiet part.
- Set the reduction amount and switch on hum removal if you hear a buzz.
- Preview, then export as MP3 or WAV.
Frequently asked questions
How does it work?
It learns the noise from the part you select (its level at every frequency) and then lowers those frequencies whenever they are not louder than the noise — a method called spectral gating. Hum removal adds narrow notch filters at 50 Hz (India) or 60 Hz and their harmonics.
What should I select as the noise sample?
Half a second to two seconds where nobody speaks and only the background is heard, for example the pause before you start talking.
Why does the voice sound watery?
The reduction is too strong for the noise level. Lower Reduction or Sensitivity. Very loud noise cannot be removed without affecting the voice.
How do I remove background noise from a recording?
Open the file, select a second of pure background noise (or click Find quiet part), keep Hum removal at 50 Hz, press Play cleaned to check, then Clean and export.
Can it remove people talking or music in the background?
No. It removes steady noise such as hiss, fan and hum. Changing sounds like voices, traffic or music cannot be separated by this method.
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