Would this provide the same result when the user has either a hearing defect or reduced hearing?
Would the above issues be irrelevant. It does sound like an interesting project though. 73 Gary On 5 February 2013 16:54, Wright, Robert <[email protected]> wrote: > This sounds like an interesting project. It would seem that the technique > would be finding the offset frequency that provides the best alignment of > harmonics, which is what we naturally do by ear. Not difficult, but would > probably need a bit of tweaking to provide good real-time performance. It > would only be valuable if it was significantly faster than what we do > manually. > > It's good when projects are self-motivating. > > 73, Bob, N7ZO > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Peter Lambert > Sent: Monday, February 04, 2013 9:25 PM > To: 'Erik Basilier'; [email protected] > Subject: Re: [Elecraft] [K3} [KX3] SSBT like CWT ? > > You are spot on, Eric > > This is an algorithm I've contemplated writing many times. > > Voice results from the vocal cords snapping together in the range around > 85Hz. The filter effect of the various cavities, throat, mouth and nasal > are quite high Q and filter the harmonic rich vocal chord excitation to > produce the voice. > > If you watch an SSB signal on your PSK waterfall you'll clearly see the > harmonics of the vocal chords. > > I think a DSP algorithm that calculates the location of the carrier based > on the separation between the vocal chords is a definite doable proposition. > > It would give SSB the perfect clarity you seek. > > Love to have a go at this (I do DSP). Do you Elecraft guys want to have a > go or interested in using it if I do it ? (I could probably do it as a > piece of PC code that processes sound card input so you could evaluate it). > Doesn't feel like to be a difficult thing to do. > > Cheers, > Peter VK4JD > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Erik Basilier > Sent: Tuesday, 5 February 2013 3:07 PM > To: [email protected] > Subject: [Elecraft] [K3} [KX3] SSBT like CWT ? > > At Field Day I have observed a number of operators operating SSB. I have > noticed that there is a great variation in skill when it comes to tuning > the RX to an SSB signal. Sometimes I feel that the op has it tuned all > wrong and I almost want to grab the knob. Maybe different people's brains > focus on different aspects of the sound when they tune the RX. Some people > seem to want to tune for the best balance between highs and lows, when the > HI CUT and LO CUT would do a better job. When I tune the RX, I believe that > I am not trying to balance highs and lows, but rather trying to find some > kind of harmony in the sound. If I were tuning in a piece of music from an > AM BC station with the radio in SSB mode, clearly the harmonics of a > musical note will not be harmonious if the radio tuning is off. If a voice > is used for singing, it is like a musical instrument. If the voice is > speaking, I believe the harmonics are still at play as with a musical note. > This leads me to speculate that it > would be possible to run an FFT on the received audio and determine by > how much the RX tuning is off, just like with CWT. I am very fond of the > CWT feature on the K3 and on the KX3. I wonder if it would be practical to > add SSBT as a new feature. > > > > 73, > > Erik K7TV > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- *Gary - VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
