FWIW At my age hearing of both ears starts to roll off in the 4khz range. I can remember when the upper limit was 20+khz. I'm a bass player so my hearing is quite acute at low frequencies. However for CW I prefer to copy at about 625hz. This is with filters set in the 50-500hz range. If I try to copy at a lower frequency the signal tends to get shrouded by noise. I have not specifically tested the ability to discriminate close signals though.
ED / W2RF -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Jim Brown Sent: Sunday, March 14, 2021 3:16 AM To: [email protected] Subject: Re: [Elecraft] Copying CW and Pitch On 3/13/2021 9:37 PM, Dave Cole wrote: > I had a hearing test many years ago, and asked to see the results. > Turns out I had a null at some frequency I don't remember right now, > but it was exactly where I had selected my sidetone to be... My guess > is because I heard less noise there... Anyway-- > > I re-selected a new sidetone, lower in frequency, and on a small peak... > My CW speed for copy increased probably 10-15%. One of the most common forms of hearing loss starts at the high frequencies and works its way down with age, but that's far from universal. When one or more notches develop at certain frequencies, it's often the result of noise exposure at work. 73, Jim K9YC ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
