I probably do not understand much about your project. But wouldn't the
simple solution be to just use the AF gain judiciously? To start at a
low setting and increase only to the level needed.


wrote:
Since many of in this group will use earphones it might be usefull to
limit the damage to our hearing that could be cuased by overly
load audio blasting into our ears.

Since I already have some minor loss in the 8KHz and up, I try to guard

my hearing from further damage. The last thing I need is more loss to
further limit my ability to understand signals lost in the noise.

http://headwize.com/articles/hearing_art.htm

I use a modified version of the clipper shown in diagram 9
at http://headwize.com/projects/cmoy2_prj.htm

For my pruposes I use the following values:
P1=1 K ohm
P2=1K ohm
R1=1K ohm
R2, not present , a direct connection to the diodes.
And I use 2 parallel sets of Si diodes in series to give a max voltage
of +/-1.4V.

This corresponds to a maximum sound level of 98dB with my
anceint Sennheiser HD-424. While safe for short periods,
96dB causes me to simply get tired after an hour or so, so
I can rdeuce the level with P2 to a more comfortable point.

I also have the ability to switch a transformer to allow receivers with

less AF voltage to be used. I choose to use a 70V, as in "constant
voltage", transformer to boast the common 8 Ohms to 500 Ohms. I
used the largest transfomrer I could find to reduce distortion that can

be caused by too little iron in the core.

I wanted the protection to be the last step before the earphones in
case
my amplifeir fires or I feed too strong a signal. The clipper" also
helps when
listening during the summer by clamping the lightning crashes to a more
reasonable level.

Terry

John S. wrote:
I probably do not understand much about your project. But wouldn't the
simple solution be to just use the AF gain judiciously? To start at a
low setting and increase only to the level needed.

Yes.
If you can be certain to never mess up.
I am experimenting with several different detectos, filters and audio
amps. Very easy to mess up and get very loud pops, squals and
other unpleasent shocks.

That, plus the fact that when trying to dig out a weak station I
turn the volume up and when someone nerby turns on a light, or
that nasty flood blender also causes very loud pops etc.

By having the limiter the last thing before my earphones I
insure that simple mistakes won't hurt.

Terry

On 24 Aug 2006 07:38:25 -0700, wrote:


John S. wrote:
I probably do not understand much about your project. But wouldn't the
simple solution be to just use the AF gain judiciously? To start at a
low setting and increase only to the level needed.

Yes.
If you can be certain to never mess up.
I am experimenting with several different detectos, filters and audio
amps. Very easy to mess up and get very loud pops, squals and
other unpleasent shocks.

That, plus the fact that when trying to dig out a weak station I
turn the volume up and when someone nerby turns on a light, or
that nasty flood blender also causes very loud pops etc.

By having the limiter the last thing before my earphones I
insure that simple mistakes won't hurt.

Terry
http://www.musiciansfriend.com/produ...sor?sku=182472

I always keep my radios and tv sets turned down lowwww.(I hate earphones
and earbuds,I never use them) I have ear tintinitus, (however it is
spelled?) but that is because I am getting old.Sometimes I hear a
swishing noise in my ears.
cuhulin

On Thu, 24 Aug 2006 10:58:22 -0500, wrote:

I always keep my radios and tv sets turned down lowwww.(I hate earphones
and earbuds,I never use them) I have ear tintinitus, (however it is
spelled?) but that is because I am getting old.Sometimes I hear a
swishing noise in my ears.
cuhulin

Tintinitis is when you hallucinate being followed around by a little
white French doggie who drinks heavily.

Isn't that,maybe the beer I drink does it to my ears.My little doggy
only drinks fresh tap water,(and eats Natural Choice dog food
www.nutroproducts.com $20.00 per twenty pound bag and every eleventh
bag is free,and I always save a few spoonfulls of whatever I eat for her
and let her clean the plate) I change the water out several times every
day.And she isn't a stupid French poodle dog.
cuhulin

David wrote:


On Thu, 24 Aug 2006 10:58:22 -0500, wrote:

I always keep my radios and tv sets turned down lowwww.(I hate earphones
and earbuds,I never use them) I have ear tintinitus,

Tintinitis is when you hallucinate being followed around by a little
white French doggie who drinks heavily.


http://www.museodelnino.es/sala4/mundocomic/tintin.jpg






mike

Hatari! movie has just now started on Radio tb. (tb,Dennis the
Menance,tb) That was John Wayne's favorite movie he was in and it is one
of my favorite movies too.
Dat Eeeeeeese! I will be in the area for a while.There is no trick
photography in the movie either and very few stunt actors.
cuhulin

wrote in message
...

but that is because I am getting old.Sometimes I hear a
swishing noise in my ears


Its ur ****ing brains sloshin around your skull ya ancient old ******* !


LOL Just joshin with ya!

Couldn't be my brain sloshing around,I dont have a brain.

www.devilfinder.com What causes that swishing noise in my ears?

My Grandpappy used to say if you have an ear ache,let somebody pee in
your ear.
cuhulin