There is a low-grade static buzz sound that one hear almost always

However there was a disturbing buzzing in the headset which can be heard on both ends (your CT14 and the person getting your call can also hear it

There was a hum buzz in the background that was rather annoying.

More humming/buzzing in background than I would like but tolerable.

No matter what i did with this, there was an incessant buzzing in the headset

Seems I'm not the only one to get a bad unit with a humming/buzzing in the background.

I picked it up this morning to make my morning conference call at work, and I noticed an annoying buzz on the line

Terrible headset that buzzes

Unfortunately, there is a low level hiss/buzz in the background that drives me nuts.

Constant buzz in the background, people complain about not being able to hear, etc

Great distance, but the buzzing was intolerable