How does sound travel? What is the use of sound to propagate?

Yes. Because of the phenomenon of bone transmission, the voice you hear is different from the voice heard by others, so the voice in the tape recorder is the same as the voice heard by others.

People usually hear their own voices, not only from their ears, but also through the vocal cords that vibrate the brain and through the bones and muscles to the ears, while with a tape recorder, the sound heard is only transmitted from the air to the ears. This makes the pitch of the voice different, but the sound you hear in the tape recorder is the same as when others hear you talking.

Sound travels in the air in the form of "longitudinal waves".

A longitudinal wave is a wave in which the direction of vibration of a particle is coaxial with the direction of propagation. For example, when a gong is struck, the direction of vibration of the gong is consistent with the direction of propagation of the wave, so the sound wave is a longitudinal wave. Longitudinal waves are a type of wave (fluctuations are divided into transverse and longitudinal waves).

Also known as "dense waves", the propagation process of longitudinal waves is the appearance of different dense parts along the direction of the wave.

Sound is propagated by the medium, gases, liquids and solids can be propagated, sound propagates in the form of sound waves in the medium, and cannot propagate in a vacuum, for example, in the air, the sound source body vibrates and causes the vibration of the surrounding air to produce sound.

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. ”

Sound travels by sound waves.

It travels through a medium (air or solid, liquid) and can be perceived by the human or animal auditory organs.

Sound must travel through mediums such as gases, liquids, and solids. The propagation speed of sound in different media is solid, liquid, and gas (exceptions: cork 500m s, less than kerosene (25), distilled water (25), etc.), and the propagation speed of sound is related to the type of medium and the temperature of the medium.

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 broken down into superpositions of sine waves of different frequencies and intensities.

It's airborne, and if it's gone, the air can't speak like a dumb person.

Sound is produced by the vibration of an object.

The propagation of sound must rely on the medium, which can be air, water, metal and other substances, but this medium must exist objectively. For example, in a vacuum, sound does not travel. For example, if you are in outer space, then it is an atomic bomb next to your ear**, you can't hear it, because sound can't be transmitted, of course, our premise is that after **, you still exist, in various media, the speed of sound propagation is not the same, generally speaking, the denser the object, the faster the sound propagates in it.

The speed of sound propagation in an object is ranked from high to low solid, liquid, gas.

The speed of propagation of sound in different mediums is different, i.e. in general, it is fastest in solids, followed in liquids, and slowest in gases; And even in the same medium, the propagation speed is different at different temperatures.

There are three conditions for sound propagation: there is a sound source, there is a medium for sound propagation, and there is a normal human ear. Sound is a wave generated by the vibration of an object, which is a wave phenomenon that propagates through a medium and can be perceived by the auditory organs of humans or animals.

Sound in general always contains a certain range of frequencies. 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.

The sound emitter emits a sound, which does not mean that the sound can be heard, so it is required to spread the sound, which requires a substance-medium that can transmit the sound Sound propagates to the surroundings in the form of sound waves All solids, liquids and gases can transmit sound, but the speed of sound propagation in solids, liquids and gases is different, under normal circumstances, the speed of solid sound transmission is faster than that of liquids, and the speed of liquid sound transmission is faster than that of gases. The sounds we hear are airborne; When you knock on a wall, the sound heard next door is transmitted by a solid; The sound of people on the shore can scare away the fish in the water, indicating that the liquid can also transmit sound The speed of sound propagation in different media and different temperatures of the same medium is also different, generally in solids, liquids propagation is faster than in gas, in the air (15) the speed of sound is 340 m s If there is no substance (i.e. vacuum), it cannot transmit sound

The propagation of sound requires a medium, and for the problem that the vacuum cannot transmit sound, in addition to doing a good job in the propagation experiment of the textbook Figure 310** sound, it is also necessary to further hypothetize and reason, in the absence of any matter (i.e., vacuum) sound cannot be transmitted When astronauts carry out activities outside the space capsule, they rely on radio intercoms to communicate with each other, which is also a good example It should also be noted that the sound emitted by the same sound source can independently propagate forward at different speeds in different media For example, if you hit the long water pipe with a hammer, you should be able to hear three sounds from the iron pipe, water and air at the other end