That link gives the most information I have seen on analysis of cockpit
noise and ways of dealing with it. You might like to sacrifice a week's
wages to get an ANR headset.
Do you have an audio panel that allows the use of headset and mike to
communicate with your student?
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chris Barker" <ftog@xxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, May 16, 2010 1:09 PM
Subject: Re: [OM] OT: Noise levels in light aircraft, was More eruptions
> Ho, ho!
>
> The Grob 115e uses a Lycoming O-360 fuel injected, 180hp engine, and it's
> probably that and the prop together causing the problem.
>
> There's a piece on the c172 on this web page:
>
> http://www.lightspeedaviation.com/content.cfm/Knowledge-Base/Tutorials/ANR-101-A-Tutorial-on-Active-Noise-Reduction/Section-3-Airplane-Issues
>
> Which seems to confirm your story, Bill.
>
> Chris
>
> On 16 May 2010, at 17:28, Sue Pearce wrote:
>
>> Eh? What you say?
>>
>> What are the powerplants on these aircraft?
>>
>> When my father was alive, one of the projects he worked on was noise
>> attenuation for light aircraft (Cessna 172, Piper equivilent). It
>> involved
>> extending the exhaust quite a ways under the fuselage, and fabricating a
>> muffler, which had a lot more engineering involved in the design than a
>> car
>> muffler. Alas, after mcuh work, it was deemed a wasted effort, as not
>> sufficiently effective.
>>
>> Good luck.
>
> --
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