Background or 'ambient' microphone noise can be a real pain, but there are tricks to help reduce it. To some extent any sound recording will generate background noise, but there's a lot that you can do to minimise interference. Follow the steps below for tips on how to minimise background noise from an audio recording.
Go to Start.
Select Control Panel
Open Hardware & Sound.
Find the Microphone bar.
Right-click on the Microphone bar, and then select Properties.
Find the Levels tab, and look for the Microphone Boost tool.
Move the dial all the way down on the Microphone boost.
Move the dial all the way up on the Microphone.
Next, go to the tab marked Enhancements.
If they aren't already ticked, tick the following boxes: Noise suppression and Acoustic echo cancellation. Press OK.
To test the noise, go back to the Recording menu.
Go to Listen to this device, then click OK.
Go to System Preferences.
Find Sound preferences and look for the Ambient Noise Reduction tool.
Check the box marked Use ambient noise reduction.
Move the dial up and down until you find the right balance of sound volume and background noise.
Use a Mic Preamplifier. This eases the transition between your microphone and other equipment.
Invest in a ground lift adaptor for your laptop power supply - these do an excellent job of reducing static noise, particularly if you use multiple sections of recording equipment.
Fit a shock mount to the mic stand to reduce background noise caused by tremors and vibrations.
Use a wind shield - this fits over the mic's head and cuts out unwanted wind interference - as well as heavy breathing!