How fast does sound travel? Where does sound travel the fastest?

Yes. White light is a composite light of seven colors of light. (red, orange, yellow, green, blue, violet) can be decomposed into seven colors of light by a prism, or by a filter to decompose a monochromatic light or a composite light of several colors. Beg.

The speed of sound refers to the speed at which sound waves travel through a medium. It is one of the important parameters to describe acoustic phenomena or acoustic research. The sound wave emitted from the sound source travels towards the surroundings at a certain speed of sound, which means that the energy of the sound wave also travels towards the surroundings at a certain velocity.

As far as is known, sound waves are capable of propagating in all matter except vacuum. Its propagation speed is determined by certain physical properties, mainly mechanical properties, of the sound transmission medium. For example, the speed of sound is related to the density and elastic properties of the medium, so it also varies with state parameters such as temperature and pressure of the medium.

The speed of sound in the gas is about several hundred meters per second, which increases with the increase of temperature, the speed of sound in the air is 331 4 meters at 0 and 340 meters at 15, and the speed of sound increases by about 0 6 meters per second for every 1 increase in temperature. In general, the sound velocity is the largest in a solid medium, the smallest in a liquid medium, and the smallest in a gaseous medium. In addition, the velocity of sound in an inhomogeneous medium varies from place to place.

The velocity of sound in an anisotropic medium varies with the direction of propagation. In some cases, the speed of sound is also related to the amplitude, frequency, and mode of vibration of the sound wave itself (longitudinal wave velocity, shear wave velocity, etc.). If the size of the propagation medium is not large enough, its boundaries also have an effect on the speed of sound.

Therefore, in order for the magnitude of sound velocity to accurately characterize the acoustic characteristics of the sound transmission medium, independent of its geometry, it is generally necessary to specify the sound wave propagation velocity when the size of the sound transmission medium is sufficiently large (theoretically infinite). Sometimes, for practical convenience, the speed of sound in certain special cases is also listed, such as the speed of sound in a solid thin rod.

Sound is a sound wave produced by the vibration of an object. It is a wave phenomenon that is transmitted through a medium and can be perceived by the auditory organs of humans or animals. The speed at which sound travels in different mediums is different.

In general, sound travels faster in solids than in liquids, and faster in liquids than in air.

The order of the speed of sound propagation in an object is 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.

Ordinary sounds always contain a certain range of echoed frequencies of the hermit. 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 propagation of sound requires matter, and in physics, such a substance is called a medium, which can be air, water, or solid, of course, in a vacuum, sound cannot be propagated, and the propagation of sound is related to temperature and resistance.

The speed at which sound travels in different media is not the same:

At air 15, the propagation velocity is 340m s.

At air 25, the propagation velocity is 346m s.

In water at room temperature, the propagation velocity is 1500m s.

At seawater 25, the propagation velocity is 1530m s.

In steel, the propagation velocity is 5200m s.

In ice, the propagation velocity is 3160m s.

In cork, the propagation velocity is 500 m s.

In pine, the propagation velocity is 3320 m s.

In nylon, the propagation velocity is 2600m s.

In cement, the propagation velocity is 4800m s

The speed of sound propagation: at room temperature 15°, the speed of sound in solids is about 5200 meters per second, in liquids is about 1500 meters per second, and in air at 15 degrees Celsius is about 340 meters per second. For example, the speed at which sound travels in a solid:

Marble 3810m s, Aluminum (rod) 5000m s, Iron (rod) 5200m s; Velocity of liquid propagation: seawater (25) 1531ms, ice 3230ms; The velocity of gas propagation: air (0) 331 m s, air (15 ) 340 m s.

When sound travels in solids, liquids, and gases, it travels fastest in solids and slowest in gases; Among solids, liquids, and gases, solids generally have the highest density and the smallest gases, so of course, the sound wave propagation is the fastest among solids and the slowest among gases. That is, the propagation speed is related to the density of the medium, and the sound velocity is faster when the density is high. Characteristics of sound propagation:

1.Reflection due to the fact that sound travels at different speeds in different media, the phenomenon of sound reflection and refraction occurs. The phenomenon of sound waves encountering obstacles while traveling and returning to the original medium is called reflection, and this phenomenon of sound wave reflection is also called echo.

The reflection of sound waves was experimentally proven as early as 1882. 2.Refraction: If sound is transmitted in different media, the phenomenon of deflection in the direction of propagation due to different speeds is called refraction.

1. The propagation speed of sound in the air is: air (15) 340m s, air (25) 346m s.

2. Different water propagation velocities are different, distilled water (25) 1497m s, seawater (25) 1531m s. Copper (rod) 3750m s, aluminum (rod) 5000m s, iron 5200m s.

3. Sound varies according to the speed of propagation in different substances. The propagation of sound is also related to temperature and resistance, as well as different densities. It affects the speed at which sound travels.

The speed at which sound travels through various types of objects:

1. Sound cannot be transmitted in a vacuum;

2. The air at a temperature of zero degrees Celsius is 331 meters per second;

3. The air at a temperature of 15 degrees Celsius is 340 meters per second;

4. The air at a temperature of 25 degrees Celsius is 346 meters per second;

5. In cork, it is 500 meters per second;

6. Kerosene at a temperature of 25 degrees Celsius is 1324 meters per second;

7. Distilled water at a temperature of 25 degrees Celsius is 1497 meters per second;

8. The sea water at a temperature of 25 degrees Celsius is 1531 meters per second;

9. In the ice, it is 3230 meters per second;

10. In copper rods, it is 3750 meters per second;

11. In marble, it is 3810 meters per second;

12. In the aluminum rod, it is 5000 meters per second;

13. In the iron rod, it is 5200 meters per second, etc.

What factors are related to the propagation speed: the speed of sound propagation in the air is related to the density of the obstructing object, because the propagation of sound is easy to be hindered or absorbed, first of all, the object with high density is easy to block the sound and reflect the sound back, so that a reflection will make the speed smaller, and the low density will easily let the sound penetrate the past part, so that the speed is also changed; In fact, the object that reduces the sound energy and blocks the sound is the medium in the propagation, but the density and friction are almost the same in the same medium, so the same medium does not have a great impact on the speed of soundSo the factors that change the speed of sound are:

The density of the medium, the friction of the same medium (it doesn't change much, so people unify the speed of sound in each medium, which is really different.) ）

The speed of sound propagation in the air is: air (15) 340m s, air (25) 346 m s.

Sound varies according to the speed of propagation in different substances. The propagation of sound is also related to temperature and resistance, as well as different densities. It affects the speed at which sound travels.

The speed at which sound travels through different media.

Vacuum 0m s (i.e. cannot be propagated).

Air (15) 340m s

Air(25) 346m s

Cork 500m s

Kerosene (25) 1324m s

Distilled water (25) 1497 ms

Seawater (25) 1531m s

Copper (rod) 3750m s

Dali wide void stone 3810m s

Aluminum (bar) 5000m s

Iron (rod) 5200m s

Vacuum 0m s (i.e. non-grinding energy propagation).

Air (15) 340m s

Empty blind Qiaoqiao gas (25) 346m s

Cork 500m s

Kerosene (25) 1324m s

Distilled water (25) 1497 ms

Seawater (25) 1531m s

Copper (rod) 3750m s

Marble 3810m s

Aluminum (bar) 5000m s

Iron (rod) 5200m s