Sound has mass?....

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
They seem to have built a theoretical model to model sound as particles. No wonder math works.
The sound changes the energy content of a considered volume: no wonder that this has gravitational effects.
Negative mass? This leads to quantum physics and vacuum energy: I can't follow.
 
Fanatic
Joined 2009
Paid Member
I think it's not too far off this: A gas with negative gravity still has mass, only it floats away from the gravitational centre in our specific gravity. Orsomethinglikethat.

Edit:
But probably behaves more like a magnetic particle than a gas, only replace "magnetic" with "gravity" sort of.
 
Last edited:
For interested parties, here's some more on the physics of 'sonic sandblasting'!

The traditional view of sound is that it is a wave motion which transfers energy without transporting mass.

The new theory suggests that sound is a particle motion. The particles of sound are called phonons and they interact with a gravitational field in a way that requires them to transport mass as they move.

For a 1-second-long, 1-watt sound wave in water, the amount of mass would be about 0.1 milligrams. “It’s honest-to-God gravitational mass, the type we experience every day.”
This and more information can be found in the following link:
Physics - Focus: Sound Waves Carry Mass
 
Sound is a human perception/notion - it is massless.
Sound is not simply a 'notion', but is classed as one of the main forms of energy along with heat, light, electrical etc. Classically, it is considered that energy is transferred via sound waves without transporting mass and, in that respect, you could say sound is 'massless'.

The new theory is a contentious one as the energy transfer is claimed to occur via a particle motion (phonons) which does involve the transport of mass. Still we can rest easy because, at the moment, this is merely a theory and has still to be proved by experiment. :)
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.