[Elecraft] K3S TX Noise Gate

[Joe Subich, W4TV]

 > But then, what does Bob Heil know about audio?

Based on the charts on his web page, Bob Heil knows *nothing* about the
structure of human voice (speech).  There is little or no usable energy
in speech below 200 Hz - even the lowest bass voices have little
*speech* energy that low.  In addition, there is little to no energy
between 800 Hz and 1100 Hz (it is believed by scientists that voice
developed that way so humans could hear danger in the presence of
voices).  Only a soprano (female) or countertenor (male) will actually
have vocal energy when singing in the 800 - 1100 Hz range but neither
will have speech energy in that range.

In any case, doing anything other than -16dB in the bottom three "bands"
and no boost at 800 Hz shows a complete lack of understanding of speech
and marks Bob Heil as strictly a *MUSICIAN* - one primarily experienced
in microphones for *INSTRUMENTS* or *VOCALISTS* not communications.

Heil's "Typical EQ adjustments for most mics or headsets" should have
800 Hz = 0 (or even -6), 1600 Hz = +3dB, 2400 Hz = +5 dB and 3200 Hz =
+6 dB (that provides a smooth 3 dB per octave increase above the nominal
level at 400/800 Hz). In most cases, 3200 Hz can even be set at 0 since
audio above 2700/3000 Hz will be cut off by the DSP modulation function
anyway!


73,

    ... Joe, W4TV


On 3/18/2018 9:07 PM, Richard wrote:
> May I draw your attention to the bottom of this page.
> 
> https://heilsound.com/heil-amateur-radio/support/dsp-settings/all-things-elecraft/
> 
> But then, what does Bob Heil know about audio?
> 
> Richard - W4KBX
> 
>> On Mar 18, 2018, at 1:25 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:
>>
>> Richard,
>>
>> Remove the boost on the high end.
>> You can reduce all bands if you want to maintain the same curve.
>> It is better not to boost, but cut instead.
>>
>> 73,
>> Don W3FPR
>>
>> On 3/18/2018 1:09 PM, Richard wrote:
>>> Bill,
>>> Tx EQ:
>>> 50  =  -16
>>> 100  =  -12
>>> 200  =  -6
>>> 400  =  0
>>> 800  =  0
>>> 1200  =  +3
>>> 2400  =  +9
>>> 3200  =  +12
>>> This works well for me.
>>> Richard - W4KBX
>>>> On Mar 18, 2018, at 10:53 AM, Bill Johnson <k9yeq at live.com> wrote:
>>>>
>>>> Do  you have the equalizer set higher levels or lower on the upper audio range?
>>>>
> 
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