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On Thu, 27 May 2010 02:39:02 +0000 (UTC), wrote:


On 2010-05-26 said:
There's already a device for that. It's called the volume
control.
very funny...
My ex was a radio announcer at one time, and one day she came home
with an ear ache. Seems the asshole at the controls found a way to
put 130db or so into her phones for a few seconds, (till she ripped
them off), making it some what uncomfortable to finish her shift.
The industry needs limited head phone amplifiers. (not just volume
controls.).

IF I'm feeding people other than myself program via
headphones or in-ear there's always limiters in the chain.
I won't be responsible for damaging somebody else's hearing
because of a screwup somewhere. YEs I'm going to be minding
the volume controls, but in a live situation I can't always
be sure something stupid might not occur.

I for one refuse to 'try' other peoples headphones, they usually
want to turn them up loud.

CAn understand that. I hate to use them even while working
ham radio on the hf bands because about the time I get a
comfortable listening level of a weak station some yokel
while dump in a carier enough off frequency that he gives me
1.5 khz or something else neat and the agc on my receiver
can't knock it down in time for it not to be painful. I'll
put 'em on if I"m trying to work a weak radio op aboard a
vessel at sea who might have an emergency or something like
that, but otherwise ...

My lady otoh won't run a net on hf without using them.


Phones are good for picking out the low level signals, but man can be dangerous!
I always listen with a squint!

I designed a PA system for a club in the 70s, and I had to build a headphone amp
for the DJ. I used an op amp which would drive his phones, and to finalize the
design, I fed it completely clipped signal at full output, and put a resistor
pad that limited the volume to an acceptable level. It was quite loud because it
was the DJ's booth and he needed some volume, but it wouldn't go as far as pain
threshold.