Do start crews headsets cancel noise?
Can anyone say for sure if the headsets used by start crews should cancel engine noise?
We operate turboprops and the start crews usually use a headset.
When the engines are running there is a muted "engine noise" from the start crew's microphone. Sometimes the start crews switch off their mike and sometimes they do not, but their speech is not drowned-out by engine noise.
I assume that the headsets have a noise-canceling function. Clearly, they need to be able to speak clearly, despite being close to the propeller.
Recently, one of our crews had a problem because the noise of the first engine starting was transmitted loudly into the pilot's headsets.
The start crews say that their headsets are the same as the pilot's, except that the plugs are different.