[Elecraft] SSB filter + Spectrograph recommendation?

[Ron D'Eau Claire]

300 Hz is a lot more common, but it is affected by your voice too. Some
voices stand more low end attenuation than others.=20

It is true that the modulation in your voice occurs at the higher
frequencies - from somewhere above 500 Hz up through 2 or 2.5 kHz where =
the
sibilances (like the 'sssss' in saying the letter "S") occur, but for =
best
intelligibility we need some of the "low end" too. The lower frequencies =
are
mostly a "drone", or tone, created by our vocal chords that changes =
volume
slightly as we open and close our mouths, but speech sounds "pinched" =
and
hard to understand without it. That drone is a very complex (distorted)
waveform that is very rich in harmonics, producing sounds across the =
"speech
spectrum". When we speak, we are modulating those upper harmonics with =
our
throat, tongue, mouth and lips.=20

Unfortunately, the lower frequency tones such as that "drone" we produce
also hog the most of the power in speech, and so in our SSB signals, so =
it's
good to minimize them.

Over time, it's been found that for most voices rolling off the
low-frequency response at about 300 Hz preserves a fairly "natural" =
sound
without excessive power being wasted in the low frequency "drone", but =
if
you want to tailor your K2's response to YOUR voice, you might =
experiment a
bit with where you cut off the low end.

Ron AC7AC

-----Original Message-----
Howdy, I've been playing with the K2 SSB OP1 and bfo filter setting and =
need

a recommendation-- my SSB board is stock and I'm using the Heil hand mic =

sold by Elecraft.

Using the Spectrograph program should I be setting the bandpass freqs at =
500

and 2400 hz then tuning the bfo so that at the 500hz point the filter=20
response begins to rapidly drop off? I see one fellow recommending using =

300hz and 2300hz settings when adjusting the bfo - is this better for tx =

audio quality?...
ed