[TenTec] Headphones and QRN

[Richards]

That seems a sensible inquiry.

It is possible that very, very inexpensive, dollar store headphones have 
limited frequency response.  But even then, they should play way beyond 
the 200 to 5,000 Hz frequency range of the human voice.    Even crappy 
phones usually play between 200 and 10,000 Hz and that would include 
enough high end to still play a lot of hissssss.

On the other hand, some professional grade intercom and studio headset 
(earphone and mic combination sets)  will have sufficiently limited 
earphone receiver frequency range.   For example, the Shure SM-2 
headset,  and the Sennheiser HMD series headsets,  have speakers limited 
to the frequency range of human speech - for pretty much the same reason 
we are discussing here.   Often the microphone is equally limited, but 
for the most part, they have full range microphones to assure it is 
particularly linear over the the speech frequencies.

But, generally folks want headphones with wide frequency range, so it is 
very difficult to find what you are looking for.  That is why I use an 
equalizer or filter to accomplish the high and low cut.


=====================  JHR  ===============================

On 8/13/2010 3:37 PM, Paul DeWitte wrote:

> I like to use some cheap light weight sterio headphones.
>
> While reading all of the ranting about headphones I got to wondering if
> there is a headphone that has a narrower freq range that makes it easier to
> copy through QRN.
>
> Maybe that is a dumb question, but chasing weak signal DX on 160m in the
> winter I can use all of the help that I can get.
>
> To keep from overloading the reflector please reply direct.
>
> Thanks,73
>
> Paul K9OT
>
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