Get rid of loud pops from audio
You can use Audacity for this purpose, and you can follow this link to learn how: http://manual.audacityteam.org/o/man/tutorial_click_and_pop_removal_techniques.html

Generally, clicks are little bursts of noise (such as a small scratch on a vinyl record), and pops are larger bursts of noise (such as a large scratch or a plosive "P" hitting a microphone without a pop filter).