Shop for Electrical at The Home Depot. The Plantronics noise suppressor doesn't actually suppress all noises. It's designed with your boom mic in mind. The 10757-00 directs more of your voice into the tube, making the person you re talking to hear your voice better and shield background noise from being heard. For true noise-canceling a noise-canceling headset is required which has a mic boom instead of a voice tube and electronically lowers background noise by up to 75% completely.