The Visual Microphone

  1. nsaspook

    nsaspook 1,306
    Science Advisor
    2 people like this.
  2. jcsd
  3. Borek

    Staff: Mentor

  4. atyy

    atyy 11,125
    Science Advisor

    Wikipedia gives some history:
Know someone interested in this topic? Share this thead via email, Google+, Twitter, or Facebook

Have something to add?

Draft saved Draft deleted