Recent content by mcriv880

  1. M

    Graduate What materials would produce an impedance mismatch?

    https://docs.google.com/viewer?a=v&pid=explorer&srcid=0B-C2IpG-te-Lblhhd2V2eEh6WUk Please see pages 20, and 25.
  2. M

    Graduate What materials would produce an impedance mismatch?

    Yes I realize they are very high frequencies for air being above 1MHz but I was looking for the entire range from 20KHz-Above 1GHz with air as a medium. Not just one specific frequency.
  3. M

    Graduate What materials would produce an impedance mismatch?

    I'm interested in methods of deflecting/shielding ultrasound up to 3GHz traveling through air as a medium. My search lead me to the study of creating impedance mismatches to affect sound wavess. I'm looking specifically for the acoustic impedance necessary to act as a shield of sorts for...
  4. M

    Undergrad What type of equipment is required to detect ultrasound above 1MHz?

    Sorry I'm interested in detecting high freq sounds traveling through air.
  5. M

    Graduate What materials would produce an impedance mismatch?

    sufficient enough to redirect/shield against ultrasound 1MHz being directed through the air. i know a vacuum would. What I'm questioning is if you had 2 layers of different materials stacked on top of each other what could prevent the ultrasound from reaching the 2nd layer assuming the 1st layer...
  6. M

    Undergrad What type of equipment is required to detect ultrasound above 1MHz?

    Please list any links in you have them.
  7. M

    Undergrad Testing for Radium: Rooms & Bodies

    How can you test an area for radium cheaply, and how can you test your body for exposure. In other words how would you test a room? And what types of tests could you get yourself?
  8. M

    : If someone was burning your head with a energy directed device?

    : If someone was burning your head with a energy directed device? Say they were very rich and performing a mean prank and burning your head causing itching and hair fall out what types of devices could be used assuming they had millions to spend.
  9. M

    Undergrad How to ground EMF shielding/clothing?

    No it's not only radio frequencies. The metal, or combo of metals must block radio, infared, x-ray, etc.
  10. M

    Undergrad How to ground EMF shielding/clothing?

    Yeah but what type of metal? X Ray hats can be bought online however I'm talking about the entire spectrum, and the manufacturing of one, not the purchase.
  11. M

    Undergrad How to ground EMF shielding/clothing?

    You didn't read my question I'm referring to EMF shielding not sandwich foil.
  12. M

    Undergrad How to ground EMF shielding/clothing?

    For example if a hat is lined with nickel, silver, EMF paint, etc. , then how do you ensure the hat is grounded? I am a little unsure what grounding means relating to these forms of usage as I have seen EMF protective clothing advertised as grounded.By EMF I mean sufficient for all freq with...