While it may seem remarkable that the flight of fireball that would generate sounds, these objects are about 60 miles when they can be seen from the ground, and the vote should take a few minutes to the journey.
Now, researchers have found that light pulses of light can make sounds that sound very far away from the "dielectric"
Heating of source-including clothing, bedding, and even curly hair.
Scientists have long been intrigued by the mysterious voice that sounds "at the same time as the arrival of light for Meteora", researchers in an article published in the scientific report.
"This vote can be linked to the spread of the upper atmosphere directly on the acoustic travel time will be a few minutes."
Vote, then, must be the result of electromagnetic energy that a Meteor go through miles of Viewer and converted into sound waves, the authors explain.
These objects are known to issue light pulses are very bright.
Meteor fireball network recorded by the Czech Republic in 2014, for example, is 10 times brighter than the full moon.And that's about as hot as the Sun.
In the study, researchers say the temperature change associated with a meteor event could be at the origin of this strange phenomenon.
"We recommend that each pulse of light can heat the surface of the dielectric sensor nature", the authors wrote.
' The surface heat quickly and cause the heat in the surrounding air, generating pressure
waves.'
"A series of waves of light pulses-produced pressure may then manifest as sound to an observer."
Transducer dielectric which is all around us, and the researchers found that dark matter would have the best properties to facilitate the phenomenon.
The team has tested several candidates, including Dark paint, hair, leaves, grass and dark clothing.
In their configuration, the researchers placed the white light LED matrix, examples of scientific and laboratory values microphone inside plastic domes in anechoic chamber.
Outside the dome, they have used a signal generator and linear amplifiers to drive the LED Spectrum Analyzer and to record the signal from a microphone, they explained in the document.
The experiment revealed that this material as much as possible, in fact, produces the photoacoustique sound.
The researchers say their findings are consistent with the testimony of the sounds associated with fireballs and suggested that, in good shape, someone in a quiet neighborhood could hear a strange sound bright Meteors.
And, people with curly hair can benefit.
"It is important that people with curly hair are reported as more likely to hear the sound of simultaneous meteor", wrote the researchers.
"Intuitively, curly hair should transducer is good for two reasons. Hair near ears will create a local sound pressure, is likely to be heard.
"In addition, the hair has a high surface to volume ratio which maximize sounds of creation."
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