The microphone boom of the Pulsar is a clear voice tube. These voice tubes have a very thin micro filter that can become clogged from moisture combined with dust. If your voice is not transmitting well, you can gently pull the voice tube off of the Pulsar headset and replace it with one of the spares that comes with the Pulsar travel case. You can also order additional voice tubes from
one of our distributors
. The part number is 70903-01.