Voice activated intercom is available a lot of reasonably priced intercom
units - this problem does not exist then!!
regards
MP (GJULZ)
----- Original Message -----
From: "Carl Pattinson" <carl_p@ntlworld.com>
Subject: Europa-List: ANR Heasdsets
>
> There is one crucial point that seems to be being missed in this
discussion.
>
> We have flown with ANR headsets for the last two years. Ours are not very
> sophisticated as they are one of the very first ones made (made by
Skyforce)
> but the |ANR does offer a very good degree of noise cancellation and it is
> true that this is mainly "bass" frequency".
>
> We were thinking of replacing these sets for a more expensive version (eg:
> Sennheiser or Pilot DNC) till my wife suggested that the noise might not
be
> coming from through the headset shells but might be amplified noise
through
> the microphone. Sure enough, when the intercom was switched off, the
headset
> noise was reduced dramatically. We have since conducted a flight where the
> intercom was kept off for long periods and this was much more relaxing.
>
> It seems possible that although advanced ANR designs may cancel out some
of
> this microphone induced noise it would be better if it could be prevented
> from being picked up in the first place. My previous headset was a Peltor
> (non ANR) and this used a voice activated microphone - I recall that again
> with the mic off there was much less noise.
>
> Before discarding our present headsets we are going to try and see if
there
> is any way of shielding the mikes from the ambient cockpit noise.
>
> Has anybody tried to do this (or even used a throat mic).
>
>
|