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|No body||Last replied to at October 25, 2015, 9:32 am|
Why people use ultrasound not sound? What is the benefit?
|Dani||Last replied to at October 25, 2015, 9:32 am|
First of all I would like to say terrific blog!I had a quick quteison that I'd like to ask if you do not mind. I was curious to find out how you center yourself and clear your mind prior to writing. I have had trouble clearing my mind in getting my ideas out. I do take pleasure in writing but it just seems like the first 10 to 15 minutes are wasted simply just trying to figure out how to begin. Any ideas or hints? Thank you!
|Kancil||Last replied to at October 20, 2012, 2:58 am|
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|PJ||Last replied to at June 18, 2009, 5:12 pm|
The key is the ratio of aperture size and wave length. When the source is very small compared to the wavelength, it is a point source, just like a speaker, the sound propagate in all directions.
For imaging or NDT, the ultrasound will travel in a narrow beam like or better than a flashlight. The resolution is achieved in this way.