Hi Ariel,

There is an easy solution which may or may not be easy
to implement.

Use two small light bulbs(for stereo). Insert one in
series with the headphone signal wire.

The hard part will be finding the right light bulb,
it'll have to be very low current and voltage since
the headphone signal is relatively small.

I'd suggest trying bulbs from Christmas tree lights.

The active range starts from just faintly glowing in a
dark room to orange.

Your kid might actually like the sound compressed like
this, however. Like Phil Spector produced stuff.

Cheerful regards,

Bob

--- Ariel Rocholl <foros@arocholl.com> wrote:

> I ran in a couple of situations in which I noticed
> my kid was not
> using headphones at a safe listening level, so I am
> a bit worried
> about it. Therefore I tried to find something
> already available in the
> market and, besides the feature offered by the iPod
> for parents
> limiting the sound level, I found no general device
> to passively nor
> actively limiting the audio levels automatically for
> a device. So my
> first question is if anyone knows a commercial
> device I can connect
> between the audio output of any gadget and the
> headphone to limit it
> to a value of my interest, regardless of the output
> level of the
> gadget itself.

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