For PC players it is possible to turn off the beep sound that plays ever second when doing bomb defuse missions.

Find this folder: Steam\steamapps\common\Door Kickers - Action Squad\media\sounds

Rename this file: bombbeep.ogg

Unless you repair/reinstall, you won't have to listen to the beep anymore. This is nice when you're spending hours grinding a bomb mission.

I did this for the voice call outs when you enter the character select screen/change character too out of personal preference. There's only so many times I can listen to "Breacher Ready!"