Researchers create 'tweezers of sound' to move objects without physical contact

[Zeedox]

The first steps to a sonic screwdriver (a futuristic tool used by Dr. Who)

Researchers create 'tweezers of sound' to move objects without physical contact

Researchers at Tokyo Metropolitan University have created 'tweezers of sound' that can move objects without physical contact.

www.ctvnews.ca

Researchers at Tokyo Metropolitan University have created ‘tweezers of sound’ that can move objects without physical contact.

The technology creates non-contact manipulation of small objects with sound waves by using an array of ultrasound transducers.

The transducers, an object that converts energy from one form to another, allowed researchers to generate a 3D acoustic (sound) field which trapped and lifted small polystyrene balls from a reflective surface.

 

[Gomez Adams]

I wonder if that's the same sort of thing that's being used against people making them sick.

 

[Zeedox]

I wonder if that's the same sort of thing that's being used against people making them sick.

Different frequencies, different effects. Ever heard of infrasound?

Infrasound - Wikipedia

en.wikipedia.org

There are the 18/19 hz 'fear' frequencies

Some "Ghosts" May Be Sound Waves Just Below Human Hearing

There are many possible explanations for hauntings, not least that humans are highly suggestible creatures, especially when we want to believe. But some ghost sightings might actually be the result of sounds — sound waves that vibrate just below our range of hearing, dubbed the “fear frequency.”

gizmodo.com

The typical range for human hearing runs from 20 Hz to 20,000 Hz (20 kHz), although this varies from person to person, and shrinks as we age. Under ideal lab conditions, some people can pick up sounds as low as 12 Hz — well into the “infrasound” range. But even when we don’t consciously hear such sounds, they may induce feelings of anxiety, especially at higher intensities. This has led some people to dub infrasound in the 18.9 Hz range — i.e., just a tad below the threshold for human hearing — the “fear frequency.”

Then there is the 7hz kill freq.

COLUMN: Low-frequency sound is silent, but it can kill you

IT CAN’T be seen or heard; it can be indoors or outside; it’s not biological, environmental or radiation, but it can make you sick or even kill you.

fredericksburg.com

The most dangerous frequency is at the median alpha-rhythm frequencies of the brain: 7 hz. This is also the resonant frequency of the body’s organs. At high volumes, infrasound can directly affect the human central nervous system, causing disorientation, anxiety, panic, bowel spasms, nausea, vomiting and eventually organ rupture or even death from prolonged exposure.

 

[Gomez Adams]

Interesting. I was just looking at the back of my powered subwoofer. The lowest cutoff range is 35 Hz.