[jhb] Re: Noise Cancellation
- From: "bones" <bones@xxxxxxx>
- To: <jhb@xxxxxxxxxxxxx>
- Date: Sun, 30 Sep 2007 15:14:07 +0100
I've used Bose headsets when flying and they really do work well. The ANC
circuit was activated by a switch on the lead and was independent of
aircraft systems - switching it on standing next to a main road (don't do
this if you don't want to look a twerp) resulted in almost all traffic noise
disappearing.
I presume the Creative headset may not have the phase inversion or delay
built in correctly.
bones
-----Original Message-----
From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On Behalf
Of Gerry Winskill
Sent: 30 September 2007 14:49
To: jhb@xxxxxxxxxxxxx
Subject: [jhb] Re: Noise Cancellation
We'd hoped that the constant background noise might have been
significantly cancelled out. My son's, admittedly very expensive, Bose
aviation headset 'phones mainly achieve this. With the Creative 'phones
it's possible to discern a slight background noise reduction; just.
Back in the sixties we did this on our GCA radar, using a delay line,
plus inversion, to achieve the same effect, to produce an MTI area. I
have to say that waiting for the first live aircraft echo to enter this
black hole, just after you'd set it up, was a sure fire cure for anal
retention!
Gerry Winskill
bones wrote:
>When you say they were not very good what do you mean by that? In other
>words what were you expecting to happen that didn't?
>
>bones
>
>-----Original Message-----
>From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On
>Behalf Of Gerry Winskill
>Sent: 30 September 2007 11:54
>To: jhb@xxxxxxxxxxxxx
>Subject: [jhb] Noise Cancellation
>
>
>My daughter has just bought a budget priced pair of noise cancelling
>Creative headphones, of the type sold for use in flight. When tried in
>here, with an FSX flight in progress, they weren't spectacularly
>successful.
>
>It struck me that the same process ought to be possible, just using a
>headset coupled to a mike equipped laptop; provided it was running
>suitable software. Does anyone know whether noise cancelling software
>is available?
>
>Gerry Winskill
>
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