Is the change in sound related to the vibration of the object? 5

The faster the frequency of the object vibrating, the greater the amplitude, and the stronger the sound.

Mammals make sounds by vibrating their vocal cords, birds by vibrating the air, and most insects vibrating their wings.

In terms of articulation principle, the vocalizations of birds are formed by the flow of air through the song pipe. Therefore, the divergence of different species of birds in the evolutionary process leads to the difference in the structure of the song pipe, which is an important basis for the identification of song. There are differences in the sounds of different sexes of birds of the same species, but experiments have shown that the difference is that some calls are usually produced only by one sex.

However, in special cases, such calls can also be made by the other sex, depending on the mode of use of similar structures. In addition, the structural changes in the chirping tube during the maturation of young birds can also lead to the difference in the sound of song between adult and young birds.

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 20 Hz and 20000 Hz) are called sounds.

Principle: Sound is a pressure wave: when playing a musical instrument, slapping a door or knocking on the tabletop, their vibration will cause the medium-air molecules to vibrate rhythmically, causing the surrounding air to produce dense changes, forming sparse 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 can be.

It is decomposed into a superposition of sine waves of different frequencies and intensities. This process of transformation (or decomposition) is called the Fourier transform.

Therefore, sound in general always contains a certain frequency range. The frequency range of sounds that can be heard by the human ear is between 20 and 20,000 hertz. Fluctuations above this range are called ultrasound, while those below this range are called infrasound.

Animals such as dogs and bats can hear sounds up to 160,000 hertz. Whales and elephants produce sounds with frequencies in the range of 15 to 35 Hz.

The propagation of sound is explained by quantum mechanics as the movement of atoms, which forms sound waves. But this is not related to nouns such as wave particles.

Mammals make sounds by vibrating their vocal cords, birds by vibrating the air, and most insects make sounds by shaking their wings.

But one thing, no matter what animal, or even anything, as long as it makes sound, there is one basic principle, which is to --- vibration.

Vibration is the essence of all sounds.

It's just that different animals vibrate in different places, some rely on the vocal cords, some rely on the wings .........

All sounds are made by vibration.

This indicates that the sound is produced due to the vibration of the object.

The reason why the listener cannot hear the sound is because the sound is blocked in the process of propagation, and the student pinched the cotton thread to stop vibrating, and the object vibrated and the sound stopped.

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

Yes

Sound is a wave phenomenon in which sound waves generated by the vibration of an object propagate through a medium and are perceived by the auditory senses of humans or animals.

The way the sound is generated:

1. Sound is produced when an object vibrates, and is transmitted through emptiness and collapse. Humans hear sound through the binaural effect, and animals are the sensory organs that use their bodies at the head of the shed"Ears"Go and receive the sound.

2. Animals can make sounds, and different animals can make different sounds, but all animals must make a certain part of their body vibrate in order to make sounds.

3. Human beings are also a kind of animals, but they are higher, so sound is produced through vibration.

Sound generation and propagation.

Sound is produced by vibrations. When you speak, you cause the air to vibrate, and the vibrations travel out, and as soon as someone's ears receive this vibration, they will hear you. Sound can travel in solids, liquids, or through air or other gases.

As the sound travels, the molecules in the air are squeezed together, then separated, then squeezed, and then separated, and so on, and so on, and sound waves are generated. The sound can be high-pitched or low-pitched. The pitch depends on the frequency of the sound (the number of vibrations per second).

The strength of the sound depends on the amount of vibration that produces the sound. If the vibration is large, the sound will be strong; The vibration is small and the sound is weak. The magnitude of sound is measured in decibels.

The noise generated by the drilling rig that repaired the road was more than 100 decibels. The brass horn in the picture, when the musician plays it, the air in the pipe vibrates, and the brass horn makes a sound. Brass pipes carry the sound so you can hear it.

In the cello pictured, when the musician pulls or plucks the string back and forth with the bow on the string, the string vibrates to make a sound. The guitar and violin also sound like this.

Sound is produced by the vibration of an object.

The object that makes the sound must vibrate, and the object that vibrates does not necessarily make a sound.

Because there are two basic conditions for sound to reach the human ear and be perceived. First, there is a sound source; Second, there is a medium of transmission.

Objects can make sound when they vibrate, but for the sound of a vibrating object to be felt, there must be a medium of propagation to transmit the sound. If you see an object making a sound in a vacuum, you can't hear the sound because there is no medium to transmit the sound to your ears, and the so-called vibrating object doesn't necessarily make a sound.

Answer A analysis: (1) Sound is produced by the vibration of an object, and when the vibration stops, so does the sound

2) The propagation of sound requires a medium, and vacuum cannot transmit sound

3) Loudness refers to the strength of the sound, which is related to the amplitude of the object

4) Pitch refers to the level of sound, depending on the frequency at which the object vibrates; Loudness refers to the large and small penetration wheel of sound, depending on the amplitude and distance from the sound source; Timbre is a property that depends on the emitter itself

Answer: a. Press and hold the tuning fork that is vibrating with your hand, the tuning fork stops vibrating, and the sound also stops, indicating that the sound is generated by the vibration of the object

b. Continuously extract the air in the vacuum hood, and the sound emitted by the ** piece in the hood becomes smaller, indicating that the propagation of sound Laxiang needs a medium, and the vacuum can not be transmitted It is not in line with the topic

c. When beating the drum, the drum surface vibrates to produce sound, the greater the force, the greater the amplitude of the drum vibration, that is, the greater the amplitude, the greater the loudness

d. Constantly cut the straw short, so that the air column in the straw gradually becomes shorter, the vibration becomes faster, and the frequency of the vibration becomes larger, so the tone it emits will become higher Because the straw is cut short, the structure changes, and the timbre will also change Undesirable