I find my RS60 to be comfortable, but sometimes wish they had a cooling system.
73,
Scott K9MA
--
Scott Ellington. K9MA
--- via iPhone
> On Dec 9, 2018, at 12:34 PM, Grant Youngman wrote:
>
> I find the RS60 very comfortable for long periods. I know others who do, and
> others
I find the RS60 very comfortable for long periods. I know others who do, and
others that don’t. I have adjusted mine for ME. Which could lead someone else
to find my specific headset uncomfortable (too tight, too loose) for THEM.
You’re certainly right that the comfort of any headset is a
On 12/9/2018 8:40 AM, CUTTER DAVID via Elecraft wrote:
Noise cancelling that I've come across is limited to low/medium frequencies.
Yes. Others have correctly identified the reason, but I'll go into a bit
of detail for clarity. Noise cancellation works by amplifying a tiny mic
on the outside
See if you can borrow a hi quality aviation noise cancelling headset to try
out. I have the now discontinued Sennheiser S1’s which work extremely well in
many situations including with a single engine open cockpit aircraft, riding
mowers, tractors, field day, etc. They have the added nicety of
I fully agree with your comment on the Radiosport. Great headphones, virtually
noise free, and on a price par with the better noise cancelling Bose/etc. Of
course, when I have mine on, my wife has to kick the chair or slap my head to
get my attention. Which may not be all bad? :-)
Grant
Noise cancelling headphones rely on the distance between microphone and
ear being a small fraction of the audio wavelength. At high
frequencies, that will be impossible to achieve, and, even if you put in
a compensating delay, the path to the ear is going to depend on the
direction of the
Noise cancelling that I've come across is limited to low/medium frequencies.
If your hearing takes you higher, the noise-cancelling has finished by then.
This is probably not the ability of the sensing mic but the circuitry and/or
room acoustics, echo, etc. I'm a little out of date on the
No noise canceling headphones will be effective against the high frequency
noise of the KPA1500 fans. However, passive headphones can be very effective.
The Radiosport makes the fans nearly inaudible. Not cheap, but neither is the
KPA1500.
73,
Scott K9MA
--
Scott Ellington. K9MA
As a guess, I would say the response of the mic used to derive the phase
canceling audio does not adequately cover the audio noise spectrum of
the 1500 puts out... Thus it can't phase cancel very well...
That or your 1500 is filled with bad magic because it is supposed to be
my KPA-1500 and
I have owned a pair of Heil noise-cancelling headphones for many years. They
worked very well to reduce the noise of my old AL-1200 amplifier, and the 5
fans on my cantankerous man-killer Henry 2002A EME amplifier. However, they
are completely ineffective against the KPA1500. I bought a pair
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