FAA paper Noise Attenuation Properties of Noise-Canceling Headsets

Have you looked at any modern audio panels?

Both PS Engineering and Garmin provide 4 +/- unswitched auxiliary inputs...



"Larry Dighera" wrote in message
...
[Possible audible alarm masking by ANR headsets warning snipped]

My old PA28-235 had a visual stall warning system, so there was no
issue there.

Given the fact that it is imperative to wear hearing protecting
headsets while operating most GA aircraft if you don't want to
permanently damage your hearing, perhaps it's time avionics
manufacturers provided warning indicator inputs to their audio panels.
Of course, such a system of providing audible alarms in the PIC's
headset would necessitate other equipment manufacturers providing the
necessary additional outputs.

"Larry Dighera" wrote in message
.. .
[Possible audible alarm masking by ANR headsets warning snipped]

My old PA28-235 had a visual stall warning system, so there was no
issue there.

Given the fact that it is imperative to wear hearing protecting
headsets while operating most GA aircraft if you don't want to
permanently damage your hearing, perhaps it's time avionics
manufacturers provided warning indicator inputs to their audio panels.
Of course, such a system of providing audible alarms in the PIC's
headset would necessitate other equipment manufacturers providing the
necessary additional outputs.


On Tue, 09 Jan 2007 15:59:19 GMT, "Bill Denton"
wrote in
:

Have you looked at any modern audio panels?

No.

Both PS Engineering and Garmin provide 4 +/- unswitched auxiliary inputs...


That might be an adequate number of inputs in most cases, but it's
still going to require equipment manufacturers of stall warning
systems, autopilots, etc to provide the audio outputs in addition to
their horns and bells.

Larry Dighera wrote:

That might be an adequate number of inputs in most cases, but it's
still going to require equipment manufacturers of stall warning
systems, autopilots, etc to provide the audio outputs in addition to
their horns and bells.

Have you ever used an ANR headphone? Most don't attentuate
frequencies that the various alarms (my gear alarm, the cessna
stall party horn, etc...) much more than the passive headphones
do.

Even engine noises are frequently enhanced by ANR. I kept hearing
a clanking noise in the ANR. I pulled off my headphones for a "better
listen" and couldn't hear it. With the ANR I heard it. On landing
I found my exhaust pipe had busted a weld and was flapping around.

On Tue, 09 Jan 2007 12:34:25 -0500, Ron Natalie
wrote in :

Larry Dighera wrote:

That might be an adequate number of inputs in most cases, but it's
still going to require equipment manufacturers of stall warning
systems, autopilots, etc to provide the audio outputs in addition to
their horns and bells.

Have you ever used an ANR headphone?

Yes. Exclusively since 1996.

Most don't attentuate frequencies that the various alarms (my gear alarm,
the cessna stall party horn, etc...) much more than the passive headphones
do.

Even engine noises are frequently enhanced by ANR. I kept hearing
a clanking noise in the ANR. I pulled off my headphones for a "better
listen" and couldn't hear it. With the ANR I heard it. On landing
I found my exhaust pipe had busted a weld and was flapping around.

Well, that's your experience. It's a data point for sure, but not a
comprehensive study.

If the FAA has found issues as a result of the popularity of ANR
headsets, who am I to dispute it. Certainly most legacy alarms were
tested and approved for use before ANR technology existed, hence my
suggestion for "piping" alarms into the headphone audio in addition to
the ambient cockpit environment.

Ron Natalie wrote:

Even engine noises are frequently enhanced by ANR. I kept hearing
a clanking noise in the ANR. I pulled off my headphones for a "better
listen" and couldn't hear it. With the ANR I heard it. On landing
I found my exhaust pipe had busted a weld and was flapping around.

I was able to hear a starter that was stuck engaged WITH the ANR set on.
The sound was not audible by my companion pilot with a non-ANR set, or
me with the headset removed.

Jim Macklin wrote:
InFO

SUBJECT: Noise Attenuation Properties of Noise-Canceling
Headsets

They are absolutely correct. It's about time someone exposed the myth!

Please send all working ANR headsets, along with a modest $10/set
disposal fee, to me for recycling.

Inoperative sets can be disposed of locally, as they pose no danger.

That is all, please comply...

Please send all working ANR headsets, along with a modest $10/set disposal fee, to me for recycling.

I've Emailed my headset to you. Could you send me a receipt for tax
purposes?

Jose
--
He who laughs, lasts.
for Email, make the obvious change in the address.

("Jose" wrote)
Please send all working ANR headsets, along with a modest $10/set
disposal fee, to me for recycling.

I've Emailed my headset to you. Could you send me a receipt for tax
purposes?


He won't get your e-mail if he's got ..."Active Noise Reduction" filters
enabled. g


Montblack

Jose wrote:
Please send all working ANR headsets, along with a modest $10/set
disposal fee, to me for recycling.

I've Emailed my headset to you. Could you send me a receipt for tax
purposes?



Your headset is still downloading into my replicator. I take it you
PayPal-ed me the fee?

Your headset is still downloading into my replicator. I take it you PayPal-ed me the fee?

No, I sent you a crisp ten dollar bill as an attachment. I know you're
not supposed to send cash through the mail, but this is the internet so
it should be perfectly safe.

Jose
--
He who laughs, lasts.
for Email, make the obvious change in the address.