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Using the Ping))) in noisey environment for musical instrument — Parallax Forums

Using the Ping))) in noisey environment for musical instrument

TonyATonyA Posts: 226
edited 2005-10-25 23:03 in BASIC Stamp
Hi,

I am interested in using the Ping))) with a musical instrument (midi controller) where it would be used with the BS2 to create midi note messages.

Would it experience "destructive interference" if used when other sounds are being produced, and would it be fast and accurate enough to measure the distance of a moving hand?


Thanks for any info, it's appreciated.

Tony A

Post Edited (TonyA) : 10/25/2005 6:20:57 PM GMT

Comments

  • TiboTibo Posts: 81
    edited 2005-10-25 20:47
    Hi,
    Easy answer : since the environement does not emit in the same band as the ping does (around 40KHZ I beleive) ther should be no risk.
    ++
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-10-25 22:16
    Tony,

    · More important is the surfaces you want to detect...Soft surfaces (Like people) don't reflect as well as hard objects (Such as walls and poles).

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  • TonyATonyA Posts: 226
    edited 2005-10-25 22:18
    I want to detect the movement of a hand. Would IR be a better choice for this?

    Thanks again,
    Tony
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-10-25 22:20
    It depends on distance...IR is only going to be good for maybe a few feet at best depending on how well you set it up.· And then there's ambient light affecting it.· The PING))) will probably work fine, but I wanted to steer you toward the more import issues that could affect it.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • TonyATonyA Posts: 226
    edited 2005-10-25 22:25
    The distance I'll be measuring is approx. 2 feet long max. I'll need to measure small distances within that 2 feet.
    Yeah, the light interference thing with IR = no good.

    I think I'll have to experiment with it.

    Thanks again,
    Tony
  • dandreaedandreae Posts: 1,375
    edited 2005-10-25 22:57
    The Ping sensor is accurate from 2cm to 3 meters.· I suggest the Ping for accuracy.

    Dave

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    ·
  • TonyATonyA Posts: 226
    edited 2005-10-25 23:03
    Very cool, thanks.

    Tony A
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