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Re: SSB transmit audio - Where's the punch?

Posted by David Gilbert on Oct 04, 2010; 7:52pm
URL: http://elecraft.85.s1.nabble.com/SSB-transmit-audio-Where-s-the-punch-tp5600109p5600598.html


By the way, having more "punch" does not necessarily add intelligibility
.... it all depends upon the voice and where the additional energy goes
in the spectrum.

73,
Dave   AB7E




On 10/4/2010 12:43 PM, David Gilbert wrote:

> I also use a cheap computer headset (I've only found one single electret
> headset out of several I've tried that ever sounded badly) with mic gain
> set to 20 and compression set to 20.   A compression setting of 25 for
> my voice still gives decent audio, but I can definitely hear the onset
> of noticeable distortion at that setting.  I'm sure most people would
> find it perfectly acceptable, though.
>
> By the way, individual voice characteristics and assertiveness have a
> LOT to do with how much "punch" a person has in their signal.  I do a
> lot of contesting and I hear lots of folks with strong signals who don't
> speak strongly enough to do their signal justice.  It has nothing to do
> with how much gain or compression they are using ... they just sound
> weak period.  Listen to the DX multi-multi's who keep their mic gain low
> enough that they don't distort but practically yell into the mic and
> you'll see what I mean.    The ones I'm referring to totally punch
> through the noise and QRM without distortion even when their signal
> isn't at killer strength.    To be clear here, I'm not referring to
> those several contest stations that have their gain and compression set
> so high they splatter +/- 8 or more KHz.
>
> I'm no audio expert, but I suspect that speaking more strongly adds more
> spectrum to someone's voice, probably shifting the bulk of the energy
> upwards toward higher frequencies.  Maybe I'll do some spectrum tests
> some time with my own voice to investigate it.   I already have one
> recent example where I was trying to help a guy address an issue he had
> with weak and marginally choppy audio.  He was transmitting while a
> friend of his was in the shack making various adjustments (I think they
> were even using a K3), but almost nothing they did helped very much.
> The friend took over the mic to make a comment and the audio immediately
> improved dramatically in both clarity and punch.  They switched back to
> the first operator and when he tried to speak more forcefully he sounded
> much better, but for him it just wasn't "natural" and he couldn't
> maintain it very long.
>
> Whatever it is, it makes a difference and I'm not sure comparing one rig
> to another using different operators is a good test.
>
> 73,
> Dave   AB7E
>
>
>
>> On Mon, Oct 4, 2010 at 11:13 AM, Rob May<[hidden email]>   wrote:
>>
>>> The K3 has sufficient equalization to tailor the sound of any microphone,
>>> the external equalizer is completely unneeded in my opinion.  My cheap-o
>>> computer gaming headset sounds really good (through the monitor) and gets
>>> great reports on the air.  When chasing DX or during a contest I'll turn the
>>> compression up to 25.  I've heard my signal through a couple of different
>>> radios that have their output online.  The audio is surprisingly good.
>>>    Setting the compression that high really makes a huge difference in average
>>> output and it makes a big difference on the other end.
>>> Rob
>>> NV5E
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