Is it true that vibrating objects can make sound ? Is it true that the sound source must be vibrati

Is it true that "vibrating objects can make sound"?

A: Not true. The range of sound that can be heard by the human ear is about 20Hz-20000Hz, and the range that different people can hear is not the same, but it is about the same. If the vibration frequency is not within this range, no sound will be emitted even if it vibrates.

Is it true that the sound source must be vibrating?

Answer: This statement is true, only vibration can make a sound.

Vibrating objects can make sound, no, they can't be placed in a vacuum; The sound source must be vibrating, the sound source that is making sound must vibrate, and if it does not make sound, it is not a sound source, and the sound source must be vibrating correctly.

Sound production. Sound is a type of wave that is produced by the vibration of an object. But sound waves are not yet sounds, and the sound emitted is different depending on the object that emits the sound.

Air and sound.

Air transmits sound. Sound travels through the air, much like ripples moving through a pond. The sound also causes the nearby air to move back and forth in the sound waves.

This phenomenon is called vibration. If the vibrations of the air reach your ears, the eardrum in your ears will vibrate, and the sound waves will be transmitted to the auditory nerve, which is the auditory nerve of the brain.

Source. The object that vibrates to produce sound is called a sound source. The sound emitted by various sound sources, we may sound high or low, and it is different because of the different frequencies of the sound-emitting objects. In nature, not only solids can vibrate and make sounds, but also gases and liquids can vibrate and make sounds.

Propagation of sound.

Sound travels through gases, liquids, and solids. The propagation of sound is that the vibration of the object drives the surrounding medium, which spreads out to the surroundings and travels farther and farther.

Not all vibrating objects are capable of emitting audible sounds, depending on the frequency and form of vibration of the object.

For objects that are capable of emitting sound, they usually produce sound waves through vibration, i.e., the vibration of the object causes the surrounding air to produce compression and sparse changes, thus forming sound wave propagation. We can only hear sound when these sound waves reach the human ear.

However, not all object vibrations are capable of producing such sound waves. For example, high-frequency vibrations, such as microwaves or rays in millions or billions of hertz, we usually don't hear sound. In addition, even low-frequency vibrations, such as vibrating tables or piano strings, are not necessarily capable of producing audible sounds, as they may not produce sound waves of sufficient intensity, or the frequency of the sound waves is not within the audible range of humans.

Therefore, an object can produce sound only if its vibrational frequency and form of vibration meet the conditions required to produce an audible sound.

Answer: Vibrating objects are not necessarily capable of emitting sound.

There are two conditions for the production of sound, one is that there must be a sound source, that is, a vibrating object; The second is to have a medium for transmitting sound, such as air.

An object that vibrates in a vacuum does not make any sound.

Therefore, vibrating objects are not necessarily capable of emitting sound.

Everything that makes sound vibrates, but everything that vibrates doesn't necessarily make sound

A normal ear cannot hear the sound of a vibrating object because there is no medium (in a vacuum) to transmit the sound. The frequency at which the emitter vibrates is not in the range of frequencies that can be heard by the human ear.

Sound production: Sound is produced by the vibration of objects. Solids, liquids, and gases can all make sounds. Everything that makes sound in nature vibrates, and when the vibration stops, so does the sound.

Sound source: In physics, the object that produces sound is called the sound source.

Save the sound: Vibration can make sound, if the vibration of the sound is recorded, and then the object vibrates according to the recorded vibration law when necessary, the same sound will be produced.

For example, in the early mechanical records, as shown in Figure 1, there are irregular grooves on the record. When the record rotates, the stylus vibrates with the groove crossed, so that the recorded sound is reproduced on the tape, the vibration of the sound source is converted into an electrical signal through the microphone and recorded on the tape through the recording head, and the playback head converts the sound information recorded on the tape into an electrical signal, and the sound is restored through the speaker.

The definition of vacuum is that there is no medium through which sound can be propagated. The medium not only refers to oxygen, but also water and solids can be the medium of sound wave propagation, and the meaning of vacuum is that there is no reputation for the above-mentioned substances. I can't go to Google, Nian Zen helped you find the encyclopedia's description of vacuum The meaning of vacuum refers to the state of gas below one atmospheric pressure in a given space, which is a physical phenomenon.

According to this definition, vacuum is not really without oxygen.

There are mediums that hinder the propagation of sound relative to the atmosphere, and the speed of sound is not the same in different media. The speed of sound in the air is about 340 m s at 1 standard atmosphere and 15 m s, and the hard eraser should be "the medium that hinders sound transmission" according to your description, but unfortunately there is no eraser in the 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.

Sound is a sound wave produced by the vibration of an object. It is a wave phenomenon that propagates through a medium (air or solid, liquid) and can be perceived by the auditory organs of humans or animals. An object that initially emits vibrations (vibrations) 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.

Sound waves can be understood as the propagation of small perturbations 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.

Wrong. The object that makes the sound must be vibrating, so the vibrating object must also make a sound, but the person who makes the sound may not be able to hear it.

The essence of sound is vibration, and the object that is making sound is called the sound source, and the sound source must vibrate. For example, the vocal cords, whose vibrations enable people to pronounce and speak.

There are also various musical instruments, stringed instruments vibrating through strings, drums vibrating through drum faces, harmonicas vibrating through reeds, and so on. Vibration depends on the object, so the propagation of sound requires a medium, which means that the vacuum cannot transmit sound.

If the noisy alarm clock in the morning is covered with a glass bell cover and the inside is vacuumed with an aspirator, no matter how noisy the alarm clock is, it will immediately be dumb, because there is no medium, and the sound cannot be transmitted at all.

Theoretically right, theoretically wrong, depending on how you understand it.

The essence of sound is vibration, so theoretically as long as an object vibrates, it will produce sound, of course, you may not be able to hear this sound, for example, there is no medium for sound in space, or this sound may be infrasound or ultrasound or something like that (maybe other animals can hear it.) ）

The reason for this is that the process of sound production is the vibration of the object - the vibration of the medium - the vibration of the eardrum in the ear. Therefore, although the essence of sound is the vibration of objects, the end point of sound is actually the vibration of the eardrum. Therefore, I personally think that if a vibrational wave cannot be captured by the eardrum of a certain animal, then the so-called "sound" will be meaningless, in other words, it cannot be called "sound" but should be called "vibration".

It's still the same sentence, depending on how you understand it. If there is no other creature in the world but one flower, can it be said that this flower is "beautiful"?

Although it is said that sound is produced by the vibration of an object, there are two possibilities that can cause "there is vibration, but no sound can be heard" One is that the object vibrates in a vacuum, and there is no medium to propagate to the outside world; The second is that the frequency of this vibration is lower or higher than the human hearing range, that is, the vibration frequency is not between 20 and 20,000 hertz, so this statement is false

Answer: Not true.

Reason: Two conditions are required for sound propagation, 1Vibration. 2.Medium.

Without medium, there is no sound.

Vibrations are bound to produce sound, dear, you're wrong.

All sound emitters are vibrating correctly: sound here refers to sounds that can cause hearing.

Vibrating objects are making sounds: this statement is problematic because the sounds here do not include ultrasound waves that are inaudible to humans.

All emitters are vibrating, right.

Vibrating objects are making sounds, wrong.

Analysis: The reason why the latter is wrong is that in the current eighth-grade textbook, sound waves are divided into: ultrasound, infrasound and audible sound, saying that vibration is making sound, which means that it is audible sound, but vibration can emit ultrasonic waves and infrasound waves, not necessarily audible sounds.

All sound emitters are vibrating correctly, because the condition for objects to make sound is vibration!

Yes, sound is produced by the vibration of an object, but when the object stops vibrating, the sound gradually disappears due to the attenuation of the sound waves.

1. Sound is a fluctuating phenomenon that is generated by the vibration of an object, which propagates through a medium (air, solid, liquid) and can be perceived by the auditory organs of humans or animals. An object that initially emits vibrations (vibrations) 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 substance.

2. The propagation of sound requires matter, and such a substance is called a medium in physics, which can be air, water, or solid. Of course, in a vacuum, sound cannot travel. The speed at which sound travels in different mediums is also different.

3. The attenuation of sound waves, due to the gradual diffusion of sound wave energy, the absorption and scattering of sound transmission medium, a sound will become weaker and weaker in the process of propagation, which is the attenuation of sound waves, and the attenuation of sound waves to a certain extent cannot cause hearing.

Sound is produced by the vibration of an object.

Yes, our so-called sound is just a sound wave that causes air vibration to be perceived by us, sound waves have to have a medium of propagation, and human hearing has a limit to the frequency of sound waves (related to the frequency of the vibrating object) perception, the upper limit is about 20,000 hertz (that is, 20,000 vibrations per second) The lower limit is generally 30 40 Hz, so if the sound wave caused by the shaking object is within this range, it is the sound we can hear, and below this range is the infrasound wave. This is very harmful to the human body; Above this range is ultrasound, which is inaudible to the human ear, but it cannot be said that there is no sound. As for whether the vibrating object does not make a sound, it depends on whether there is a medium, and if it vibrates on the moon (almost in a vacuum), it will not make a sound, which is why astronauts who have landed on the moon have to radio talk very closely.