dawidi99
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37,5 kHz ULTRASOUND & ANTI-SOUND ?
CAN SONAR USE ANTI SOUNDS TO LOCATE A SOUND EMISSION SOURCE AND LOCATION ?
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WaterStreet, June 14, 10:42AM EDTSOLUTION
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ASKER
what I mean is that emitted anti-sound could be used to locate a sound emission that otherwise because of its signal weakness wouldn't be detectable : you could invent a "game" that would be like a "treasure hunt" for a weaker and weaker sound emission to be located using anti-sound sonar : the weak sound wavelength's characteristics tagged to the the "treasure" would be published but it would be up to the treasure hunters to perfect their active detection equipment...
a cancelled out radiosignal doesn't mean a return signal but I believe things are more complex than that and combinations of two or three anti-sound emitters would show a "black spot" where the searched for sound emission would "cancel" out the anti-sound search signal or siginficantly atenuate it.
other techniques taken from the physics of light could yield interesting probes : sound interference, sound wave cumulation (like waves on the ocean synchronising and forming twice, thrice, 4X, waves downstream),sound emission regular interruption-like a stroboscope helping to tune a vintage petrol engine distributor.... or have I gone off the edge again ?
isn't sound just a continuation of the spectrum of light : photons don't really exist but are just "quantas" of EM energy, no ?
Did you know that the french at the beginning of WWII developed anti-aerial guns using sound location for targeting ? the english even built a precursor of radar based on sound -still visible on the east coast of GB in the form of curved walls supposed to concentrate the sound of aproaching nazi airplanes...
WaterStreet gave hard facts on real world technology he has used himself : thanks.
a cancelled out radiosignal doesn't mean a return signal but I believe things are more complex than that and combinations of two or three anti-sound emitters would show a "black spot" where the searched for sound emission would "cancel" out the anti-sound search signal or siginficantly atenuate it.
other techniques taken from the physics of light could yield interesting probes : sound interference, sound wave cumulation (like waves on the ocean synchronising and forming twice, thrice, 4X, waves downstream),sound emission regular interruption-like a stroboscope helping to tune a vintage petrol engine distributor.... or have I gone off the edge again ?
isn't sound just a continuation of the spectrum of light : photons don't really exist but are just "quantas" of EM energy, no ?
Did you know that the french at the beginning of WWII developed anti-aerial guns using sound location for targeting ? the english even built a precursor of radar based on sound -still visible on the east coast of GB in the form of curved walls supposed to concentrate the sound of aproaching nazi airplanes...
WaterStreet gave hard facts on real world technology he has used himself : thanks.
ASKER
AF-447 blackboxes are still not located : I think these boxes should have their own passive transponders to be able to locate them with active and not just passive means.
Related Questions :
1) are transponders active or passive in their mechanism of action ?
2)Can a transponder made to work in the air with radar air_traffic control work under water ?
...... when the object goes beneath the surface : this situation is exceptional since I don't think there any situations in daily life where this exists except for the crash of a plane at sea.
Related Questions :
1) are transponders active or passive in their mechanism of action ?
2)Can a transponder made to work in the air with radar air_traffic control work under water ?
...... when the object goes beneath the surface : this situation is exceptional since I don't think there any situations in daily life where this exists except for the crash of a plane at sea.
If an object is to be located by its emission of a sound signal it is not sonar but noise cancelation can still be used to enhance the accuracy of location of the sound source.