[Elecraft] ESSB

[Phil Wheeler]

On 11/17/14 12:27 PM, Joe Subich, W4TV wrote:
>
> > Another way to look at this is that our ear is 
> most sensitive to
> > frequencies around 2 kHz (roughly) and so you 
> really want to put as
> > much of your power in that region as you can. 
> In this way, you're
> > using the response of the other op's ear to 
> your advantage.
>
> Not entirely ... equal loudness curves show peak 
> sensitivity around
> 3 KHz independent of sound pressure levels.
>
> Human voice has very little energy between 700 
> Hz and 1200 Hz with most
> of the power (fundamental energy from the vocal 
> chords) between 200 and
> 500 Hz with sibilance and unvoiced energy 
> (sounds made with the tongue,
> teeth and lips) that contribute to "definition" 
> (consonants) in the
> 1400-4000+ Hz range.  The ear needs a balance 
> (although not 1:1
> relationship) between lows and highs for best 
> intelligibility.
Yes, very true as I discovered recently. I added a 
hearing aid to my only functional ear a week ago 
and found not only improved volume but improved 
freq response (in retrospect, not a surprise!). 
Now folks with high, "squeaky" voices are much 
more intelligible than they were before.

The downside is using headphones: I've preferred 
an Apple ear bud and have quite a collection. So 
I'm experimenting with new headphones vs. removing 
the hearing aid. I tried one over the ear type, 
well reviewed, that resulted in a sequence of 
chimes in the hearing aid -- not a good sign.

So now I can hear ESSB better -- but I still don't 
like appreciate it: Big hog of bandwidth, IMO. And 
it's so easily recognizable on my P3 or PX3.

73, Phil W7OX