"even a small sidetone delay can drive one nuts"
How small? 5 mS? You will not notice 5 mS, but 5 mS is indeed small.
I would not argue the statement "even a *noticeable* sidetone delay can
drive one nuts", but what is noticeable?
During 30+ years in the automotive industry, we had a rule of thumb that
anything under 100 mS couldn't be "noticed" by the human operator.
Generally, this was as applied to momentary presses on control switches,
which begs the observation that whether a delay is noticeable depends on
what the reaction is referenced against. Delays on asignal received
over the air are not noticeable because the mind has nothing to
reference it against. A noticeable delay on the CW sidetone will indeed
be noticeable to the operator. I know - I've experienced trying to send
CW with the sidetone passed thru a Timewave DSP filter, which is why
they provide an input from the amp relay keying line to bypass the
filter during transmit.
I'm not here to argue Jim's original point. A/D & D/A conversions do
indeed add delay, but these are pretty darn small with modern
technology. I might suspect that more delay is introduced through the
transmission time of the Bluetooth signal, which is finite and limited
by bandwidth constraints.
Without data or real life practical experience, this entire discussion
is nothing more than speculation.
Dave,/K8CC
Retired Electronics Engineer
On 12/4/2015 2:28 PM, Michael Clarson wrote:
Dave: The inline microphones usually sound fine (mine is on a BOSE earbud
set) but they tend to pick up a lot of background noise. As for Bluetooth,
typical Bluetooth has a latency delay of about 150 ms. There is special low
latency Bluetooth of about 40 ms, which was developed so if one uses a
Bluetooth headset to watch video, the audio and video are closer to being
in sync. While delays of this magnitude are often tolerable on voice, if
one runs CW, even a small sidetone delay can drive one nuts 73, Mike, WV2ZOW
On Thu, Dec 3, 2015 at 3:02 PM, David Siddall <hhamwv@gmail.com> wrote:
Bose offers an in-line mic to go with the QC15 and QC25 headphones. It's
intended use is for wireless phone calls. Has anyone tried using it for
SSB and attained decent voice quality?
Related Question: does anyone have a recommendation for a BlueTooth
headset and microphone combo for SSB, if not the Bose? I'm trying to go
more "wireless" in the shack, especially after shelling out $50+ to Heil
for cord replacement.
And yes, I realize that given the recent discussion about the "assisted"
category, when intending to enter as a single op I will have to use the
BlueTooth headset and/or microphone at WiFi 2.4 GHz channel 6 or below to
stay within the ham allocation. Otherwise using it may constitute
utilizing a non-ham frequency to solicit QSOs? Or maybe just using
BlueTooth would make my entry assisted? Or using my wireless mouse to log
with N1MM (which I have not forced to channel 6 or below.) OTOH, as N3QE
pointed out, there can be some benefits to the assisted category ....
(Funny face.)
73, Dave K3ZJ
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|