The Ancients Knew the Power of Sound We are Only Discovering Now

[chr0naut]

The air being moved is not the primary driver of sound.  The medium is beyond air.

Radio waves still move through space, even if they cannot make a sound that is heard by an ear.  The medium is still relevant in space and there can be sound waves in space.

Again, the sound wave (vibration & medium) is what causes air to move and make sound that is heard.  The air is not separate, it is part of what makes heard sound, but it is a different component than the vibration & medium.

The medium has positive mass, and the sound wave has negative mass.  The negative mass is what drives acoustic levitation, not air forces.

When someone throws a baseball at high velocity, the pitcher has mass, and the ball has mass, and the catcher has mass, but how much mass does a 'throw' have?

How can a 'thrown' ball strike something with force, if a throw has no mass?



Perhaps a 'throw' is a general description of several specific concurrent conditions, and isn't itself a physical object?

Or,

Perhaps a 'throw' is an antigravitational effect that causes a negative reality inversion which demodulates the wave/particle Eigenvalues of the observer quantum effect, and therefore, the strike force of the ball (in a way explicable by the Schrödinger equation), exists in superposition between Newtonian reality and the mind of the observer... as 'The Ancients'™ well knew!

[Astyanax]

In the same way the guitar string makes air vibrate, air vibrating makes the wall vibrate. The wall vibrating makes the air on the other side vibrate.

Correct in theory. In practice, the vibration of the string can’t produce much movement in the ambient air, so it can’t produce a very loud sound. But the vibration of the string causes the guitar bridge, to which it is connected, to vibrate at the same frequency, and transfers that vibration to the top of the guitar, which is designed to be very easy to set into motion at the frequencies the instrument produces. The guitar’s sides and back then act like a lens to focus and amplify the vibration of the top, and that is actually what moves the air.

With an electric guitar, the vibration in the string alters the magnetic flux as it moves over the magnets of the pickup, which induces a current of the same frequency and phase – and proportional amplitude – in the coil wound round the magnets. That current, electronically amplified, is converted back into sound by your amp speakers (whose coils and magnets act like pickups in reverse, producing an electromotive force that moves the speaker cones; this is called electromotive force. That moves the ambient air, producing a sound of the same pitch, etc as the vibration of the string.
 

But if the wall is very rigid and thick it will react less to the vibration, so the sound we hear on the other side of the wall is lower.

Most English speakers would interpret this as ‘lower in pitch’. You mean ‘lower in loudness.’

Neither the thickness nor the ‘rigidity’ (meaning exactly what?) of the wall are fundamental; what is fundamental is the mass per unit volume of the material of the wall and the difference between the pitch of the sound and the resonant frequency of the wall. These factors determines how much energy is required to set it in motion.

Notice I put the word ‘volume’ within inverted commas or use 'loudness’ as a synonym. The technical term for what we perceive as loudness is sound pressure level, or SPL, measured in decibels (dB). This is the best compromise we have for translating a psychological perception (loudness) into a physical quality (air pressure).

[ArMaP]

Correct in theory. In practice, the vibration of the string can’t produce much movement in the ambient air, so it can’t produce a very loud sound. But the vibration of the string causes the guitar bridge, to which it is connected, to vibrate at the same frequency, and transfers that vibration to the top of the guitar, which is designed to be very easy to set into motion at the frequencies the instrument produces. The guitar’s sides and back then act like a lens to focus and amplify the vibration of the top, and that is actually what moves the air.

Exactly. That's why making a good acoustic guitar is not easy, everything in them may affect que quality of the sound.

Most English speakers would interpret this as ‘lower in pitch’. You mean ‘lower in loudness.’

Correct.

Neither the thickness nor the ‘rigidity’ (meaning exactly what?) of the wall are fundamental; what is fundamental is the mass per unit volume of the material of the wall and the difference between the pitch of the sound and the resonant frequency of the wall. These factors determines how much energy is required to set it in motion.

For "rigidity" I meant the opposite of flexibility.

I really don't know much about this (as you probably noticed).

[MonkMode]

Because they are a completely different thing.


For us humans, in most situations, the medium is the air. If you are under water, the medium is the water. If you put your ear against an object then the object is the medium.

The medium is gravity.

Gravity is the opposing forces of a hollow bell spinning inside an opposite spinning grindstone.

That is the force that initiates sound and radio waves.

Contrary to popular belief, radio waves do need a medium to travel.  They are not magic.  Neither is a guitar a magical instrument that can move walls (slightly).

[andy06shake]

The medium is gravity.

Gravity is the opposing forces of a hollow bell spinning inside an opposite spinning grindstone.

That is the force that initiates sound and radio waves.

Contrary to popular belief, radio waves do need a medium to travel.  They are not magic.  Neither is a guitar a magical instrument that can move walls (slightly).

Your problem being none of that matches how sound, gravity, or radio waves work.

Sound needs a material medium like air, water, or steel because it's a vibration of the particles in that material.

Radio waves are completely different, and as has been explained, they're electromagnetic waves.

Gravity isn't a medium, it's a force, and there's no evidence for a "hollow bell" or "grindstone" model.

As for guitars, they're not magical. 

The vibrating string moves nearby air, creating tiny pressure waves that makes the walls vibrate slightly by transferring energy, not by breaking physics.

Why don't you just say aether MonkMode?

You know you want to.

[MonkMode]

Your problem being none of that matches how sound, gravity, or radio waves work.

Sound needs a material medium like air, water, or steel because it's a vibration of the particles in that material.

Radio waves are completely different, and as has been explained, they're electromagnetic waves.

Gravity isn't a medium, it's a force, and there's no evidence for a "hollow bell" or "grindstone" model.

As for guitars, they're not magical. 

The vibrating string moves nearby air, creating tiny pressure waves that makes the walls vibrate slightly by transferring energy, not by breaking physics.

Why don't you just say aether MonkMode?

You know you want to.

You wish I will say aether.

Electromagnetic radiation also requires a medium to propogate, which is the gravitational field from the bi-bell in a grindstone.

This thread has been an amusing learning experience for me, thx to the OP and the participants. But I think it’s getting close to quitting time again.  I’m no fan of repeating the same points over and over.

I will bid you piggies adieu with a good old ribbing.  Enjoy your delusion that you know more than the big bad wolf while it lasts.  You’re making the exact same physics mistake.

[andy06shake]

You wish I will say aether.

Electromagnetic radiation also requires a medium to propogate, which is the gravitational field from the bi-bell in a grindstone.

This thread has been an amusing learning experience for me, thx to the OP and the participants. But I think it’s getting close to quitting time again.  I’m no fan of repeating the same points over and over.

I will bid you piggies adieu with a good old ribbing.  Enjoy your delusion that you know more than the big bad wolf while it lasts.  You’re making the exact same physics mistake.

So what is this magic medium then you're proposing, if not something along the lines of the aether? 

Electromagnetic waves don't need a gravitational field to travel.

They cross empty space just fine.

And we measure light from distant stars and spacecraft signals every day...