Sound cues in CSGO are as important as visual cues, proper utilisation of sound can give you a huge advantage over your opponents. Sound of bomb plants, defuses, snipers scoping, weapons reloading, breaking of vents and most importantly footsteps. Even the lightest sound can give away most of your game plan, while you can get a rough idea about that of your opponents.
Such tools should be developed with extreme care as exploitation of it might lead to something as similar to that of wall hacks. But this config has been approved by both Valve and FaceIt, players are clear to use this as long as the config is remain unchanged.