Sound is produced by vibration, and vibration must produce sound

Yes, for example, the plate that usually holds the dish can make a sound when it shakes on the table, the gong and drum can make a sound, and even you can make a sound when you go to beat the water.

Example of propagation in solids: "Man-made**", with a rope and two Coke bottles tied to each end, two people can talk when they are far apart.

Example of propagation in liquids: Sounds or speech can be heard under the surface of the water while swimming.

Example of propagation in gas: The sound we usually hear is propagated in gas.

Sound is produced by the vibration of an object

1。The singer's vocal cords vibrate to produce a loud singing voice.

2。The bowl fell to the ground, vibrating, and the sound of the bowl breaking could be heard.

3。The sound of the vehicle's tires rubbing against the ground.

2 solid, we put our ears on the ground and we can hear the sound. liquid, we walked into the river, and the fish in the water heard the footsteps and swam away.

gas, we can hear the teacher speak.

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.

When sound is made, sound waves are generated, which inevitably cause the object itself to vibrate.

Vibration does not necessarily make sound, which can be proved by examples in life, an object that sways up and down, left and right in the air, without hindrance, does not necessarily make sound.

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Strictly speaking, as long as there is vibration, there must be sound, although it may not be transmitted. But there must be sound generated by vibration, it may be infrasound, sound waves, ultrasound. In secondary school and university knowledge, a vacuum cannot transmit sound, but if you consider quantum fluctuations, sound can also travel in a vacuum (and there are phonons), and although the vacuum transmission performance is surprisingly poor, it can still transmit sound.

Vibration is a universal phenomenon in the universe, which is generally divided into macroscopic vibrations (such as **, tsunami) and microscopic vibrations (thermal motion of elementary particles, Brownian motion). Some vibrations have a relatively fixed wavelength and frequency, while others do not. Two objects with the same vibration frequency, when one object vibrates, the other object can produce the same frequency of vibration, this phenomenon is called resonance, and the resonance phenomenon can bring many benefits and harms to human beings.

Different atoms have different vibrational frequencies and emit spectra of different frequencies, so the spectrum analyzer can be used to find out which elements a substance contains. At room temperature, the magnitude of the particle vibration amplitude determines the form of the substance (solid, liquid, and gaseous). Different substances have different melting points, freezing points, and vaporization points, which are also determined by the different vibrational frequencies of the particles.

What we usually call air temperature is the amplitude of the vibration of air particles. Any vibration requires energy, and without it there is no vibration.

Absolute zero, which is defined by physics, is the temperature at which even elementary particles cannot vibrate, and is also the lowest temperature in the universe. The principle of vibration is widely used in **, construction, medical, manufacturing, building materials, detection, military and other industries, there are many small branches, and the in-depth study of any branch can promote the development of science and promote social progress.

Hello! First of all, there is no doubt that sound is necessarily produced by vibration. The so-called vibration means that there is a return and a return, and this going and returning follow a certain time law.

For example, when you fan a fan, your fan will go back and forth, and the number of times you fan the fan per second is the frequency of this vibration. Have a great day!