If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
InFO
Information for Operators U.S. Department InFO 07001 of Transportation DATE: 1/5/07 Federal Aviation Flight Standards Service Administration Washington, DC http://www.faa.gov/other_visit/aviat...ne_safety/info An InFO contains valuable information for operators that should help them meet certain administrative, regulatory, or operational requirements with relatively low urgency or impact on safety. SUBJECT: Noise Attenuation Properties of Noise-Canceling Headsets Purpose: This InFO alerts operators, directors of operations (DOs), chief pilots, and flight crewmembers who may be using noise-canceling headsets of the potential for misdetection of audible alarms and other environmental sounds. Background: Ordinary (non-noise-canceling) headsets reduce ambient noise levels through a physical means by providing some acoustical quieting. Noise-canceling headsets cancel noise through a combination of physical means and electronic means. While this technology can have many beneficial effects such as providing clearer communications, reduced pilot fatigue, and added comfort, electronic attenuation of important environmental sounds and alarms may occur. Discussion: Noise-canceling headsets are most effective over a narrow frequency range, but the specific frequencies may vary by make and model. Also, these electronically attenuated frequencies are often proprietary to the manufacturer and may not be publicly available. Therefore, it is difficult to assess any effects the headsets may have on discerning environmental sounds such as: .. Vital communications between flight crewmembers or flight attendants, other than those attainable through interphone operations; .. Abnormal mechanical noises or abnormal engine sounds; .. Audible alarms other than those discernible by electronic means; .. Vibrations or wind noises; or .. Other aircraft during ground operations. Recommended Action: Operators, DOs, chief pilots, and crewmembers of aircraft should evaluate their use of noise-canceling headsets. The FAA recommends sampling the available manufactured makes and models when performing such evaluations, since performance and attenuation properties vary. Evaluations should be conducted while both on the ground and in flight during normal operating conditions to ascertain if any audible alarms or other environmental sounds, or combinations thereof, can be detected while electronic noise attenuation is on and active. If any audible alarms or environmental sounds cannot be discerned, operators should elect to find other solutions to discern such alarms or sounds, or discontinue the use of noise-canceling headsets. Approved by: AFS-200 |
#2
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
Jim,
Operators, DOs, chief pilots, and crewmembers of aircraft should evaluate their use of noise-canceling headsets. Done that. It's a complete non-issue. I wish they were that good... -- Thomas Borchert (EDDH) |
#3
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
Jim Macklin wrote:
InFO Information for Operators U.S. Department InFO 07001 of Transportation DATE: 1/5/07 Somebody wasted my tax dollars coming up with this piece of "obvious" drivel? Try them on and see what you can hear? I need to get some FAA contracts going. |
#4
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
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. -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
#5
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
wrote in message ups.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. |
#6
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
[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. |
#7
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
"Ron Natalie"
I need to get some FAA contracts going. Ron, Sell them something that I can buy that will filter out all the government drival... something like ANR contact lenses. Of course that would iniciate an AC advising us not to use them during flight... Jim |
#8
|
|||
|
|||
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. |
#9
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
I was reading it yesterday,,, I'm with you on this one; what a waste of tax
dollars! I printed out my copy to show to my fellow CFI's at my FBO - we all had a chortle or two. -- =----- Good Flights! Cecil E. Chapman CFI-A, CP-ASEL-IA Check out my personal flying adventures from my first flight to the checkride AND the continuing adventures beyond! Complete with pictures and text at: www.bayareapilot.com "I fly because it releases my mind from the tyranny of petty things." - Antoine de Saint-Exupery - "We who fly, do so for the love of flying. We are alive in the air with this miracle that lies in our hands and beneath our feet" - Cecil Day Lewis - |
#10
|
|||
|
|||
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets
"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. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Aviation headsets and NASCAR noise | Casey Wilson | Piloting | 6 | September 9th 05 05:58 AM |