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
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