It sounds about as loud as background noise in an office. That amount of amplification will raise the level of the noise to -30dB (-30 = -70 + 40) which is much more audible and intrusive. If the loudest part of your signal is much quieter, say -40dB, then you will need a lot more amplification to get a decent output level, namely 40dB.

That will raise the noise levels to -60dB, which is all but inaudible. The less you have to amplify, the smaller the noise component of your recording will be.įor example, if the loudest part of your signal is at -10dB and the noise is at -70dB, then you will want to amplify by 10 dB to get your signal to 0dB (which is standard). Make the signal as large as possible, relative to the noise, without going so far that you get clipping. That means that our key strategy for removing noise from recordings is: Any noise captured before any amplification is also amplified along with the signal.

Signals from microphones are very small, much smaller than the signals that are output by a music player, so every digital recording system will have at least the following components:Įvery stage except the last will add some noise. What is noise? Noise is nothing more than unwanted sound in your recording. 2.1 How much reduction? OR Using the noise removal dialog.