What is the highest speed of sound? How fast is the speed of sound?

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The speed of sound in the air is about 1 m s at 15 standard atmospheres and 340 m.

The speed of sound (the speed at which the wave is transmitted) and the material condition of the medium (density, temperature, pressure...).) has an absolute relationship, and has nothing to do with the velocity of the speaker (wave source) itself, and if there is a relative motion relationship between the voice emitter (wave source) and the listener (observer), a Doppler effect is formed;

From this point of view, we can know that many physical phenomena at supersonic speed (seismic waves, sonic booms, sound barriers. In fact, it has nothing to do with sound, but is a physical phenomenon caused by the dense accumulation of compressed waves. The speed of sound propagation is fastest in solids, followed by liquids, and the slowest speed of sound in gases.

Normally the speed of sound is the speed of sound in the air and is in meters and seconds (1,236 kmh) in normal air.

1086 kmh). The speed of sound varies depending on the state of the air (e.g. humidity, temperature, density). For example, the speed of sound at sea level at zero degrees Celsius is about 1,193 km/h;

The speed of sound at 10,000 meters is about 295 meters (1,062 kilometers per hour); In addition, for every 1°C increase, the speed of sound increases by meters and seconds. The upper limit of the speed of sound depends on the fine structure constant and the photoelectron mass ratio, which is about 36 kilometers per second.

There are two possible sound waves in solids, one of which is the same longitudinal wave as the fluid and the other is the transverse wave that the fluid does not, and the two different sound waves can have different velocities of propagation (e.g. ** waves). The velocity of sound in the form of longitudinal waves depends on the compressibility and density of the medium, whereas the velocity of sound in the form of transverse waves in solids depends on the stiffness and density of the medium.

There are also two different types of "sound waves" in superfluids, the first is the same density wave as ordinary fluids, and the other is the second sound wave that is unique to superfluids.

Elevation changes and their effects on atmospheric acoustics.

In the Earth's atmosphere, the main factor affecting the speed of sound is temperature. For a given ideal gas with a constant heat capacity and composition, the speed of sound depends only on temperature; Whereas, the speed of sound depends only on the temperature. See details below.

In this ideal scenario, the effects of the decrease in density and the decrease in altitude pressure cancel each other out, except for the residual effects of temperature.

As the temperature (and thus the speed of sound) decreases with altitude up to 11 km, the sound is reflected upwards away from the listener on the ground, creating a shadow at a certain distance from the sound source. The decrease in sound velocity with altitude is known as a negative sound velocity gradient.

However, this trend varies above 11 km. In particular, over about 20 km in the stratosphere, the speed of sound increases with altitude due to the increase in temperature caused by heating within the ozone layer.

The speed of sound in the air is about 15 m seconds at 1 standard atmosphere and 340 m seconds, which is about 1224 km/h. The speed of sound is the speed of propagation of a weak pressure disturbance in a medium, and its magnitude varies depending on the nature and state of the medium.

Supersonic speed refers to the state of speed greater than 340 meters per second, and the speed less than 340 meters per second is called subsonic, which is equal to the speed of 340 meters per second as the speed of transpersonic, and the speed of sound will vary depending on the temperature or pressure. Definition of hypersonic: Speeds greater than 5 times the speed of sound are generally considered to be hypersonic.

Supersonic. When the Mach number is >, it is called a supersonic flow, and such flow conditions are encountered in aerodynamics. Now China has successfully developed and successfully tested a hypersonic aircraft that can reach up to 6 times the speed of sound.

When any object is flying at hypersonic speeds, ultra-high temperature air currents are generated behind the shock wave of its head, so it is necessary to choose heat-resistant materials. The approximate velocity of Mach is generally considered to be equivalent to m s, which in turn is equivalent to approximately 1225 km h, mph, or 1116 ft s. It is considered equal to the speed at which sound travels in the air at 15 degrees Celsius.

The above content refers to Encyclopedia - The speed of sound.

The speed of sound is about 340 meters per second。And the speed of light is much faster, reaching about 300,000 kilometers per second. However, this is not always the case at these two speeds.

Both light and sound are made up of waves, and the speed of propagation of these waves varies depending on the medium. For example, in a vacuum, light does travel at a speed of about 300,000 kilometers per second, but in water it travels much slower. The same happens with sound waves in water.

Sonic generalizationSupersonic velocity refers to the speed at which the speed of sound exceeds and is often expressed in Mach numbers. The Mach number is defined as: Ma=V a, where Ma is the Mach number, V is the speed of flight, and a is the speed of sound at the position of the aircraft.

When MA>1 is supersonic; When MA>5 is called hypersonic.

At supersonic speeds, drag, temperature, and aerodynamics can change dramatically, and the resulting sonic boom can damage aircraft structures. In the sixties of the last century, the Concorde jointly developed by Britain and France and the Tu-144 of the former Soviet Union opened up a precedent for supersonic flight of human business airliners.

To put it simply, the speed of sound in the air is about 1 meter at 15 standard atmospheres and 340 seconds.

Air in the case of a standard atmosphere with 15 degrees Celsius is about 340 meters per second.

Depending on the environment, the speed of sound will vary, such as altitude and medium.

The speed of sound, also known as the speed of sound, refers to the speed at which sound waves propagate in a medium, and is one of the important parameters to describe sound wave phenomena or acoustic research. Do you know what the speed of sound is?

The sound waves emitted from the sound source propagate at a certain speed of sound, which means that the energy of the sound wave also travels around at a certain speed. It is known that sound waves are capable of propagating in all matter, and the speed of propagation of sound is determined by mechanical properties except for vacuum.

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 and increases with the increase of temperature, the speed of sound in the air is about meters at 0 and 340 meters at 15, and the speed of sound increases by about meters and seconds for every 1 increase in temperature.

In general, the velocity of sound is greatest in solids, less in liquids, and smallest in gases.

In a flowing gas, the propagation velocity of a weak disturbance is also the speed of sound relative to the gas flow. In a flow field where the temperature t is not constant, the speed of sound at each point is not the same, and the speed of sound comparable to the temperature at a certain point is called the "local sound speed" of that point. When the temperature of the gas flow is very high (such as hypersonic flow), or there is an external excitation source, the kinetic energy of the internal vibration of the gas molecules is large, and the degree of dissociation of the molecules is high.

In this case, when the temperature of the gas changes very quickly due to the sweep of a weak pressure wave, the translational kinetic energy and rotational energy of the gas molecule can quickly reach the corresponding equilibrium value, but the characteristic time required for the molecular vibrational energy and dissociation energy to reach the new equilibrium state is much larger, and in the propagation process of the wave, it can be considered that there is no change in this part of the internal energy, that is, the gas is in a frozen state (see Non-equilibrium flow).