"the voice armonics or 'simpathy sounds'"

Hello everyone, On my site
http//:www.SoundOfIndia.com
I recently received the following message:
---------------------------------------------
http://www.soundofindia.com/feedback.asp" <feedback@soundofindia.com>
Date: Thu, June 6, 2002 2:19 am
To: feedback@soundofindia.com
Priority: Normal

Subject: voice armonics

Hi!
I am a singer and music teacher. I am very pleasure with your page. It is really wonderful.
Could you send to me some information about the voice armonics or "simpathy sounds" of fundamental sound of voice and how to produce it? Thank you very much.
----------------------------------------------

Now, can someone tell me what the writer means, and, in any case, what the reply to this could be? I appreciate your help.

Thanking you in advance and in anticipation,
Haresh.

--- In tuning@y..., "hbakshi1" <hareshbakshi@h...> wrote:
> Hello everyone, On my site
> http//:www.SoundOfIndia.com
> I recently received the following message:
> ---------------------------------------------
> http://www.soundofindia.com/feedback.asp" <feedback@s...>
> Date: Thu, June 6, 2002 2:19 am
> To: feedback@s...
> Priority: Normal
>
> Subject: voice armonics
>
> Hi!
> I am a singer and music teacher. I am very pleasure with your
page. It is really wonderful.
> Could you send to me some information about the voice armonics
or "simpathy sounds" of fundamental sound of voice and how to
produce it? Thank you very much.
> ----------------------------------------------
>
> Now, can someone tell me what the writer means, and, in any case,
what the reply to this could be? I appreciate your help.
>
> Thanking you in advance and in anticipation,
> Haresh.

perhaps the writer is referring to overtone singing, a technique
prevalent it Tuva and also explored by David Hykes' Harmonic Choir?