[TenTec] Speech to Text

[Rsoifer at aol.com]

I seem to get the best reports with my Orion II's TX EQ flat, bass roll-off 
 at 150 Hz, and TX bandwidth at 2850 Hz.  The mic is a T-T 707.
 
73 Ray W2RS
 
 
In a message dated 12/6/2010 7:22:43 P.M. GMT Standard Time,  
glhuber at msn.com writes:

Recently  I experimented with the TX equalization on my OMNI-VII by 
attenuating the  lows and increasing the highs. What I found was, it didn't 
help, at least  in contests it didn't, even with the amp on. I get better 
and 
unsolicited  reports with the TX equalization set for flat!


73 es  DX,

Gary - AB9M

-----Original Message----- 
From: Dr. Gerald  N. Johnson
Sent: Monday, December 06, 2010 1:02 PM
To:  tentec at contesting.com
Subject: Re: [TenTec] Speech to  Text

Interesting point. I see newbies tuning just to the point they can  copy
and the audio sounds to be 200 or 300 Hz off frequency which  doesn't
improve copy and is far enough off tune with a transceiver they  often
don't get copied on the other end during an operation like  FD.

It is nicer to tune for the most natural sounding voice. I base  that on
harmonics of the low pitches of the voice matching the high  frequency
components. I think this is the fundamental of the best SSB  tuning, that
the harmonic voice components truly are at the harmonic of  the
fundamental. Same thing when tuning SSB broadcast music. There  that
accurate tuning is more critical to my musical ears.

I don't  have any hardware or software procedures for that tuning, but
I'd think  about maybe showing the spectral components as received with
the harmonics  of the lower voice frequency components multiplied
mathematically in a  different color so the operator could tune the
receiver so the harmonics of  the low pitches matched the transmitted HF
components. Not transmitting  those harmonics and the gap between them
and the fundamentals is one scheme  used to narrow voice communications.

Perhaps a SSB auto tuner could be  developed based on matching the 
harmonics.

73, Jerry, K0CQ

On  12/6/2010 12:01 PM, kf6e at mail.com wrote:
> This just occurred to me: How  would a deaf person tune in a SSB
> signal?  You can see a CW  signal on the spectrum of CW Sweeper and
> other CW reading programs;  likewise for PSK and RTTY.  But I can't
> imaging how you would  tune in a SSB signal without hearing it.  Just
> lining it up  within a spectral range wouldn't work, because of
> differences in mics,  audio processors, propagation, speakers, etc.
> Since speech-to-text  software uses harmonic relationships to
> discriminate among sounds (I  believe) being off by more than a few Hz
> could keep it from working at  all.
>
> I sometimes have trouble tuning in sideband (I am  hearing-impaired,
> but not deaf), so if there's a way to augment the  tuning process, I'd
> be very interested.
>
> 73, Frank KF6E  _______________________________________________
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