Researchers created sound that can bend itself through space, reaching only your ear in a crowd

[Analogous]

Researchers created sound that can bend itself through space, reaching only your ear in a crowd

By combining ultrasound with a concept called nonlinear acoustics, you can create sound that stays silent until it reaches a specific location.

theconversation.com

 

[sbg]

oh boy! Now, in due time expect DRMs at the sound propagation level.

 

[alpha1]

I could follow the concepts of the article, but this part:

Normally, sound waves combine linearly, meaning they just proportionally add up into a bigger wave. However, when sound waves are intense enough, they can interact nonlinearly, generating new frequencies that were not present before.

felt like hokum. Not the non-linearity concept, but the point that non-linearity is being used in this typical configuration.
Needs more reading from my side.

 

[Analogous]

Don’t know about that part. Possibly a journalist taking journalistic liberties.

But I know a fantastic application for this technology: vehicle horns that target only the person who offends or behaves bizarrely on the road with no one else hearing the horn
The noise from the horns on the roads in countries like ours would reduce considerably