Can sound kill you?
Yes! And sonic weapons already exist!
Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure, incapacitate, or kill an opponent.
Rather shockingly, the European Space Agency says that it now has such a sonic weapon in its arsenal that, if it was so inclined, could kill you.
The huge horn pictured above is one of four giant acoustic orifices at the ESA’s Large European Acoustic Facility (LEAF) in Noordwijk, the Netherlands. It’s an ESA-built device that subjects satellites to the same levels of noise produced by rockets as they take off and fly through the atmosphere. The ESA’s horns are essentially giant air horns, using nitrogen gas to produce sounds as loud as 154 decibels (multiple jets taking off).
Is 154 decibels enough to kill you?
In all honesty, probably not. 150 decibels is usually considered enough to burst your eardrums, but the threshold for death is usually pegged at around 185-200 dB.
What about the strange sounds in the sky?
This post gives a great overview about the strange sounds phenomenon and why it turns people crazy.
Are Strange Sounds sonic weapons?
It’s important to note that a sonic weapon doesn’t have to be lethal or incredibly loud to be effective. High-intensity ultrasonic sound (generally anything above 20KHz) can cause physical damage. Some very low frequencies (infrasound) can apparently cause your eyeballs to vibrate, making it very hard to see. Targeted “sonic bullets” that cause localized pain (or simply burst your eardrums) is probably enough to immobilize most non-action-hero humans.
The captured Hum’s power spectral density peaks at a frequency of 56 hertz. The Taos Hum was between 40 to 80 hertz. Higher-pitched tones have also been reported.
So, there you have it: Strange sounds will not kill you. They are only very painful for those hearing it. Whether they are a sonic weapon or not is unclear. Conspiracy theorists speak about HAARP (High Frequency Active Auroral Research Program), an ionospheric research program jointly funded by the U.S. Air Force, the U.S. Navy, the University of Alaska, and the Defense Advanced Research Projects Agency (DARPA).