MythBusters Motion Sensor
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Uploader Comments (astroboy0969)
Top Comments
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ROFL "holy sheet, it works" xD
2 years ago 64
All Comments (73)
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Ultrasonic sensors should only be used as proximity sensors or as burglar sensors in limited space or doors. Quality Dual technology sensors using PIR and Microwaves 99.9% can't be defeat simultaneously,specially if they are paired with Beam Sensors covering a wide area near the other sensors.
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@magicmace3 Sound and light wave are completely different. The sheet does not reflect it sound waves but it does light waves. Sound needs a medium (particle) to travel though, as you would of heard in space no one can hear you scream. That because there is no medium. Light does not need a medium.
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These things work on heat movement.
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wow!
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Metal Gear's Stealth: So expensive
Plain bed sheet : Win and cheap
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@magicmace3 the color of the sheet is irrelevant when it comes to soundwave reflection.
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HAHHAHHAAHHAHAHAHHAHAHHAHAHHHA
HHAHAAHHA -
oh the simple ways that security can be defeated
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@magicmace3 Well, color has no effect on the absorption of sound. The reason color affects light is that light is an electromagnetic wave.
More than likely, I think it's just that the sheet is a flat surface, so the sound waves bounce off it in a similar manner to the way they bounce of the wall.
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@magicmace3 i think those are two different types of waves you are talking about though
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so now we know how to break in to our neighbour's house
smfrnd 2 years ago 53
yep!!
astroboy0969 2 years ago 6
"....HOLY SHEET !!!"
LOL! XD
Xcelcio 2 years ago
HOLY SH**T!!
:D
astroboy0969 2 years ago
i think the bed sheet only worked because it reflects the waves.
when i saw this i thought about this
the reason they place white rocks on top of buildings is because the white rocks reflect most of the suns waves cooling the building.
so the white bed sheet reflects most of the waves that would set off the sound waves.
magicmace3 2 years ago 6
The first time I saw this video, I can't believe it!!
LOLZ!
astroboy0969 2 years ago