Flaps on take-off and landing

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.

mike

"Matt Whiting" wrote in message
...
Mxsmanic wrote:

Thomas Borchert writes:


I'd really like a source or two for that statement.


Why do you need a source? If you know how ANR works, it's obvious
that it could be done with windows (although it's equally obvious that
it might not be worth doing).

I know how ANR works and I think it is obvious that it could not be done
with windows.

Matt

Mike,

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.


The point is: How would you get the right interference at the ear
independently of ear location relative to the ANR noise source?


--
Thomas Borchert (EDDH)

"Thomas Borchert" wrote in message
...
Mike,

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.


The point is: How would you get the right interference at the ear
independently of ear location relative to the ANR noise source?

I have read about whole cabin systems, too. I don't remember what kind of
aircraft it was, but it was at least 6 place, I think.

The theory is that you use multiple microphones near the sound conducting
surfaces, and multiple speakers. You knock the sound down as soon as it
enters the cabin.

From the reports I have read, there are "sweet spots" in the cabin, where
the noise canceling is more effective than in other places in the cabin, so
you are right; it is not perfect.
--
Jim in NC

As long as it's is a small confined space it works. I e-mailed Bose a couple
of years ago to see if they'd ever tried it in an industrial setting. They
said it wouldn't work there because of the large area and many point sources
of noise. In small spaces, it works just fine.

mike

"Thomas Borchert" wrote in message
...
Mike,

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.


The point is: How would you get the right interference at the ear
independently of ear location relative to the ANR noise source?


--
Thomas Borchert (EDDH)

mike regish writes:

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.

Yes, transducers are one way to do it. It's technically possible, but
I don't think it's really very practical or useful.

--
Transpose mxsmanic and gmail to reach me by e-mail.