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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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. |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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. |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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. |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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... |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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. |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
("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 |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
On Tue, 9 Jan 2007 07:09:20 -0700, "Matt Barrow"
wrote: wrote in message oups.com... Somebody wasted my tax dollars coming up with this piece of "obvious" drivel? Try them on and see what you can hear? Phhhhtttt. These guys are pikers, Ron. Hell, at least they're studying something quasi-useful. Here's a good one: There are "government studies" going on nationwide -- to the tune of tens of millions of taxpayer dollars -- trying to figure out why people are FAT, as if this is some sort of mystery. Closer to (my) home, let's talk about the hundreds of thousands of dollars spent on "environmental impact studies" for our runway extension in Iowa City. As if any one of us couldn't have written a fact-filled report on any given weekend, describing the effect of adding 1000 feet of pavement to the end of the runway. Or, perhaps, we should talk about the University of Iowa's "driving simulator" that has cost millions, and generated little real science? Or their ongoing millions in grants to develop "synthetic vision" -- when it's already for sale in ads in every aviation magazine. The more you look, the sicker you become. It's best not to think about it. Hey! They gotta **** away $2.7 TRILLION _somehow_. Gotta keep up the hysterics about deficits, ya' know! Buying off voters with illegal pork is a lot cheaper than bribing them with your own money. That's why they need user fees. Taxpayers won't put up with such waste, so they need to get money from people who have no say in the matter. RK Henry |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
Larry,
If the FAA has found issues as a result of the popularity of ANR headsets, I don't think it says that anywhere in that INFO. It says us pilots should go and find out. -- Thomas Borchert (EDDH) |
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
"RK Henry" wrote in message ... On Tue, 9 Jan 2007 07:09:20 -0700, "Matt Barrow" wrote: Hey! They gotta **** away $2.7 TRILLION _somehow_. Gotta keep up the hysterics about deficits, ya' know! Buying off voters with illegal pork is a lot cheaper than bribing them with your own money. That's why they need user fees. Taxpayers won't put up with such waste, so they need to get money from people who have no say in the matter. The taxpayers have been putting up with $$$BILLIONS wasted for DECADES. How do you think we got to a $2.7 Trillion Federal budget (not to mention another $2.4 trillion on the state and local level)? With User Fee's and the right arrangement (significantly different than we have now), we have much more control over the next generations ATC system development. See Robert Poole's article on this in the November issue of _Professional Pilot_ magazine. -- Matt --------------------- Matthew W. Barrow Site-Fill Homes, LLC. Montrose, CO (MTJ) |
#20
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FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
The sound was not audible by my companion pilot with a non-ANR set, or
me with the headset removed. This fits 100% with our experience as well. ANR headphones *enhance* hearing, and certainly cannot mask the sound of any stall horn/buzzer. With our Lightspeed Twenty3Gs, we routinely hear things that are completely inaudible (lost in the noise, actually) without them. I remember a flight to OSH when we kept hearing a weird whooshing noise. We were throttled way back to 20 squared, to stay in loose formation with a slower plane -- something we had rarely done before. The noise continued, and we simply couldn't figure out what it was. After a few minutes it finally dawned on us: We were hearing the wind as it rushed over the fuselage. Try THAT without ANR headsets! -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
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