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Noise Cancellation in Old BiPlane

Discussion in 'Electronic Design' started by Joe G \(Home\), Jan 20, 2009.

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  1. Hi All,

    I'm helping research for a system that can cancel out cockpit noise in a
    professional aircraft headset (David Clarke). Hence noise cancelling
    microphone are already in use.

    The Biplane cockpit is so noisy that system is needed.

    Do you know / recommend / Suggest a system that might be suitable.

    Thanks in advance.

  2. What's wrong with buying a Bose aviation headset? About $1K US.


    Best regards,
    Spehro Pefhany
  3. Not bad -- but this cancels the noise in to the headset speaker.

    I am also looking for cancelation of the noise getting in to the headset

  4. Geo

    Geo Guest

    That is how the noise cancelling microphone works - it is open on both sides of
    the diaphragm so that ambient noise (almost) cancels.
  5. Rich Grise

    Rich Grise Guest

    [ top-post repaired ]
    When I was in the USAF (1968-1976) they had headsets that were like
    standard ear defenders, but with another piece that went over your mouth
    and nose. It had the same kind of noise insulation (basically, a hard
    plastic exterior and a bunch of soft foam inside) as the earthings, but
    I think you still kind of had to shout into it, and it was uncomfortable
    as hell.

    But they _DID_ get the job done. ;-)

  6. Eeyore

    Eeyore Guest

    Physically impossible.

    Suggest you get a spam can instead.

  7. Joerg

    Joerg Guest

    Isn't it considered a sin in aviation to muffle that sweet sound of the
    big old radial engine up front? I enjoyed every second of it, including
    the oil splatters on the shirt. The owner had to then fly it back to
    Mariposa and I asked him whether the noise would go on his nerves during
    long flights. "Are you kidding? This is like music!"
  8. krw

    krw Guest

    Right. It gets on his nerves when it stops.
  9. Analog Devices has an app note on how to use a DSP to cancel fan noise.

  10. I loke the Throat mike idea.... what did it sould like? normal voice or much

  11. Joerg

    Joerg Guest

    In the Stearman we did not have any problems with either and the gear
    was not the fancy Clarke stuff, looked like plain old military issue.
  12. Mikey


    Jan 21, 2009
    Try this place

    Try looking up Envisys dot com
    I'm New to this board, it will not allow URLs
  13. krw

    krw Guest

    A little garbled but I don't think you could tell the difference. ;-)
  14. I'm helping research for a system that can cancel out cockpit noise in a
    I found out more... the BiPlane Pilot already has system using a mobile
    phone. with an audio patch circuit to a David Clark headset.

    I will get the pilot to ring my land line (POTS PSTN) and record the
    iPlane - while he is talking to me and without any talking..

    I'll record it using Opensource (free) Audacy software on a PC.... then do
    a audio spectrum plot to see if we can notch out the noise.

    I aleady have a telephone interface circuit that plugs in tp the microphone
    of the PC...

  15. Joerg

    Joerg Guest

    iPod, iPhone, iPlane ? Finally Apple must have come out with something
    really useful. Cool! I wan't one :)
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