Are vibrating objects in a vacuum making sound?

The answer is that the vibrating object is making sound, but because it is in a vacuum, there is no medium, and the sound waves cannot be transmitted and heard. There is a theory that because it is not heard, it is defined as not making sound, which can be understood in this way, but suppose a precise experiment has a precisely measured tape recorder on the object, and a vacuum surrounds the object and the tape recorder. Then the tape recorder will record that sound, and after the experiment is over, the tape recorder can hear it.

Sound is a wave, a wave is produced by the vibration of a medium, and the vibrating medium through which the object emits sound is itself, that is to say, the vibrating object itself acts as the medium of the wave. Then if the tape recorder and the object are not connected together, but leave a distance, even a small distance, no sound will be recorded.

By the way, I would like to correct a mistake of the previous one. If it is said that sound waves require a medium, this statement is true. If it is said that waves need a medium to propagate, then there is nothing wrong in Maxwell's theory of electromagnetism in classical physics, but classical physics is only an approximate science, and it is wrong to use the view of quantum theory.

Light travels millions of light-years away to Earth, and before it is observed, it manifests itself in the form of waves, not particles, and only appears in the form of particles for a fraction of a moment (a very short period of time, which can be seen as point time) when it is observed. Then the light can still travel before it travels here.

Note: It does not exhibit particle properties until light is observed, it is a pure probability wave, and therefore does not propagate by itself, let alone through the so-called"Ether"or something to spread. Rather, it establishes the wave function of the probability distribution of the light wave at the moment it is emitted, but at the moment it can be seen, the wave function shrinks to a value, that is, the probability of appearing in the place you see is infinitely close to 100%.

It cannot be said that between the two rooms A and B are rooms with a vacuum wall, in which the object in A makes a sound, and B does not hear it.

From the point of view of B, does it mean that the object in A does not make a sound?

In my opinion, the definition of sound is the process by which an object becomes a sound source, whether it is a vacuum or not, but any vibrating object becomes the source of sound, and the vacuum is just the propagation of no medium, just like when you cover your ears and you can't hear others talking, no medium can propagate.

We used to say that we only heard a sound and said that it made a sound, but as long as there was a vibration, it would make a sound, but there was no medium, and it could not transmit sound.

The question is so classic that it feels like it can be said to be vocal or non-vocal.

In the sound of sound, but there is no medium conduction, because the propagation of sound is a medium!

In vocalization, there is just no medium and cannot be conducted.

In my personal opinion, I don't think there is a sound, and the condition for voice is to have both a sound source and a medium! The sound source is the vibration of the object, the object vibrates but needs the medium to propagate to emit it, otherwise the sound cannot be emitted even if the object is vibrating! Whether or not you are making a sound is determined whether you can receive a sound signal!

As long as the object is vibrating, it will emit sound, and there is no air in the vacuum as the medium of sound, so the sound cannot be transmitted.

Sound has to be propagated by the medium, and vacuum cannot transmit sound.

You can't hear the sound just because you have a medium.

Its vibration is called "sound" when it is transmitted to the air, and it can also be called "sound" when it is transmitted to water, and it seems to be called "sound" as long as its vibration is transmitted to a certain medium. So, in a vacuum, what about the gravitational waves it emits?

In vocalization, just can't make a sound in a vacuum.

Sound is produced by the vibration of an object. When the vibration stops, so does the sound; Everything that makes sound vibrates; Echo is the phenomenon in which sound is reflected back when it encounters an obstacle during propagation. The echo wall in the Temple of Heaven in Beijing, the sound wall in the well-known Beijing Temple of Heaven, the three-tone stone, and the circle mound have a very wonderful sound phenomenon, which is the acoustic effect caused by the reflection of sound by the ancient architects of our country.

What is sound Wang YinSound is a sound wave produced by the vibration of an object. It is a fluctuating phenomenon that propagates through a medium (air or solid, liquid) and can be perceived by the auditory organs of humans or animals. The object that initially emits vibrations (base agitation) is called a sound source.

Sound travels in the form of waves that vibrate (vibrate). Sound is the motion formed by the propagation of sound waves through any medium.

Sound is a wave. Sounds that can be recognized by the human ear (frequencies between 20Hz and 20000Hz) are called sounds.

What is a sound wave Acoustic wave can be understood as the propagation of a small perturbation of a medium that deviates from the equilibrium state. This propagation process is only the transfer of energy and does not take place the transfer of mass. If the perturbation is relatively small, the propagation of the sound wave satisfies the classical wave equation and is a linear wave.

If the disturbance is large, the linear acoustic wave equation is not satisfied, and the dispersion of the wave and the generation of shock waves will occur.

That's right. Sound is generated by the vibration of an object, and the object that is emitting sound is called the sound source. Sound is a pressure wave:

When playing a musical instrument, banging on a door, or knocking on a tabletop, their vibrations cause the rhythmic vibration of the medium, the air molecules, to cause the surrounding air to produce dense changes, forming dense longitudinal waves, which produce sound waves, and this phenomenon will continue until the vibration disappears.

As a kind of wave, frequency and amplitude have become important properties to describe the wave, the magnitude of the frequency corresponds to what we usually call pitch, and the amplitude affects the magnitude of the sound. Sound in general always contains a certain range of frequencies. The frequency range of sounds that can be heard by human excitation is between 20 and 20,000 hertz.

Fluctuations above this range are called ultrasound, while those below this range are called infrasound.