Re: [PATCH 3/8] McBSP: OMAP3: Add Sidetone feature

[Eero Nurkkala <ext-eero.nurkkala@nokia.com>]

On Mon, 2009-10-12 at 11:32 +0200, ext Mark Brown wrote:
> On Mon, Oct 12, 2009 at 12:28:25PM +0300, Eero Nurkkala wrote:
> 
> > As mentioned, in some (or most) cases the absolute sinetone level (dB)
> > is expected constant. Even a volume change should not effect the
> > sidetone level. Thus, if there's a change in volume, the sidetone gains
> > should be readjusted. If that can happen automatically, that would
> > be just nice =)
> 
> That's what you said, but could you please go into a bit more detail
> about why you beleive that this should be the case?  Is there some
> hardware limitation here?

No HW limits here... it's all about the hmm, "friendliness" of
sidetones.

"The more intense the side-tone, the less intensely the speaker talks."
(June 12, 1948) [REF]

So changing the headset volume should not make the speaker talk
more/less intensely? Of course it all depends... this is just one
aspect to this.


[REF]

LOUDNESS OF SPEAKING: THE EFFECT OF THE INTENSITY
OF SIDE-TONE UPON THE INTENSITY OF THE SPEAKER
Kenyon College 
Acoustic Laboratory
Gambier, Ohio 
School of Aviation Medicine and Research
N.A.S., Pensacola, Florida