Re: [IRCA] Sync Detection Question

["CHARLES HUTTON" <charlesh3@xxxxxxx>]

I've always found the 2.3 kHz filter to be quite usable by carefully tuning 
away from the carrier to place the carrier at the very edge of the filter 
passband

Doing that generally lets me get about 2500 Hz worth of audio which places 
it bery near to telephone network quality.

Something else to think about is the difference between audio 
intelligibility and audio quality. It turns out that for most types of 
sounds made by our vocal tracts (with the exception of so-called fricatives 
and sibilants like "s" and "f"), the intelligibility is almost all conveyed 
in frequencies below 2.3 kHz even though it may not sound so good.


Chuck


>From: Peter Jernakoff <Peter.Jernakoff@xxxxxxxxxxxxxx>
>Reply-To: Mailing list for the International Radio Club of 
>America<irca@xxxxxxxxxxxxxxxx>
>To: irca@xxxxxxxxxxxxxxxx
>Subject: Re: [IRCA] Sync Detection Question
>Date: Wed, 18 Jan 2006 11:53:46 -0500
>
>
>
>
>
>J.D. -
>
> >>and the 2.3 khz filter is too narrow for listenable
> >>audio.
>
>The audio emanating from my Drake R8B with the 2.3 khz filter engaged is
>very
>listenable. Indeed, I rarely stray from this filter when I MW DX. Granted I
>wouldn't
>want to spend a relaxing evening listening to my favourite programming with
>said
>filter engaged, but for me for MW DXing, it's powerful tool.
>
>Regards,
>
>-Pete Jernakoff-
>K3KMS
>
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