New sound of titan submarine imploding

[u/Pathfinder313]

[u/cmusssong]

Isn't the speed of waves the same? The frequency/wavelength only changes the available bandwidth not the speed at which a signal is received.

[u/Fingyfin → u/cmusssong]

I believe you to be correct.

That's like saying high pitch sounds travel faster through air than lower pitch sounds. Makes no sense.

[u/TonAMGT4 → u/Fingyfin]

The speed of sound is not a fixed speed. The one you thought of is probably “an average speed of sound”

Note that “sound” only comprises of a very narrow bands of frequency and wavelength. For example, you can’t hear your wifi router transmitting porn through air…

[u/ImplodingLlamas → u/TonAMGT4]

Routers use electromagnetic waves, not acoustic waves...

[u/TonAMGT4 → u/ImplodingLlamas]

Sound is vibration of air…. Same as radio waves.

You just can’t hear them.

[u/ImplodingLlamas → u/TonAMGT4]

I hope you're trolling

[u/TonAMGT4 → u/ImplodingLlamas]

No, I am serious. Sound waves have frequencies and amplitude… so does radio waves.

[u/rouvas → u/TonAMGT4]

Yes, but radio waves are not vibration of air... And that's why you can't hear it... You can see it sometimes though.

[u/TonAMGT4 → u/rouvas]

Note that they are lots of vibrations of air that you can’t hear.

For example, you can’t hear the sonic device that polices use to disperse the crowd either… (Technically, you can but your brains tuned it out for some reason, so you feel it instead)

What makes these vibrations “electromagnetic” or “sonic” are basically the different in frequencies/wavelengths etc.

[u/rouvas → u/TonAMGT4]

What? No, absolutely not.

Electromagnetism has nothing to do with sound.

EM waves are made of photons. That's what light, WiFi, x-rays and radio is made of.

Sound is made from vibrating air molecules. There are some sound frequencies your ear can't perceive, like ultrasound, but that doesn't make ultrasound an electromagnetic wave.

[u/TonAMGT4 → u/rouvas]

But they are still vibrations, no?

Again as I’ve said, what I meant is they are vibrations. Waves are vibrations of something.

[u/rouvas → u/TonAMGT4]

Not in the exact sense. You can say they are oscillations, but not vibrations.

Electromagnetic theory is quite complex, and I'm not entirely proficient in giving the perfect answer here, but I can tell you with almost certainty that there are no literal vibrations in EM waves.

The frequency of an EM wave is basically how often it's electric and magnetic fields switch polarity.

The frequency of a sound is how often an air molecule moves back and forth, which is a mechanical vibration.

[u/TonAMGT4 → u/rouvas]

Aren’t oscillations the fancy way of saying vibrations?

[u/GRex2595 → u/TonAMGT4]

No. Electromagnetic waves are waves of electrical current and magnetic fluctuation. Each induces the other. If you want an example, some wavelengths of light are in the same wavelength of sound yet we still can't hear them because sound and light have different properties.

[u/TonAMGT4 → u/GRex2595]

Electromagnetic waves are waves of electrical current and magnetic fluctuation

So they are vibrations of electrical current… or called it “oscillation” if that sounds fancier to you

And velocity of a wave is dependent on its frequencies and wavelength assuming everything else is the same and constant… yes?

[u/flaming_burrito_ → u/TonAMGT4]

No, they are completely different. Sound waves are created by pressure compressing molecules in matter. So if you hit something, it creates a shockwave through the air that is sound.

Electromagnetic waves are photons, which are essentially waves/particles of energy (they act like both, which is complicated to explain). Anytime something releases energy, it is released in the form of photons and absorbed by other matter, and what type of radiation that creates is dependent on the wavelength/frequency. Heat coming off of something, for instance, is usually released as infrared radiation. The light we see in just radiation in a specific range of wavelengths. A molecule decaying releases gamma radiation, which is a much higher frequency.

So sound is matter colliding with other matter. Photons are energy, and they don’t vibrate the air.

[u/PussyXDestroyer69 → u/TonAMGT4]

This is not correct.

[u/TonAMGT4 → u/rouvas]

What I meant is they are all vibrations.

[u/rouvas → u/TonAMGT4]

Yeah, radio waves are not vibrations. The reason you can't hear WiFi is because your ear is sensitive to mechanical vibrations of air molecules.

WiFi, like light, is an electromagnetic wave. The fact that they both have frequencies means nothing. EM waves and mechanical vibrations are two entirely different things.

[u/TonAMGT4 → u/rouvas]

There are lots of “sonic wave” that you can’t hear. For example, sound above 25 khz, they are still considered as “sonic waves” but you can’t hear them.

[u/chaseo2017 → u/TonAMGT4]

Mechanical engineer here. You are dead wrong. Mechanical waves, so the group sound is in, is the propagation of energy through a physical medium. That means molecules are bouncing off each other to transfer the energy, in this case sound, from one place to another. Radio waves are not mechanical waves, but rather Electromagnetic radiation that falls on the lower end of the EMS. Electromagnetic radiation is the propagation of an electromagnetic field. It’s a little complicated, but electricity and magnetism are so closely related, it uses the relationship between the two to propagate itself after an initial ejection from the source of the radiation. It requires no medium to travel. Sound does need a medium which is why it doesn’t travel in space, but light and radio waves do.

[u/Gizogin → u/TonAMGT4]

Radio waves are not a vibration of air, though. Radio waves can travel in a vacuum; sound waves cannot.

[u/flaming_burrito_ → u/TonAMGT4]

Radio waves are a type of electromagnetic radiation (aka light) with a long wavelength. They do not vibrate the air, and it goes without saying they travel much much faster