On the question of sound, how is sound produced?

After reinstalling the system, you need to reinstall the sound card driver to have sound. To find the sound card driver of the new system, how to find the sound card model in the motherboard integrated sound card and how to install the sound card driver?

Reinstall the sound card driver with the driver disc that came with it. If you don't have a driver disc, you can know the sound card model, if you don't even know the sound card model, you can find it, click "Start" - "Run" - enter DXDIAG, open "DirectX Diagnostic Tool" - sound, view your sound card model from the open interface, and then go to "Driver Home" ** driver software, decompress and backup.

If it can't be installed automatically, you can right-click "My Computer" --Properties "--Hardware" --Device Manager", open "Sound, ** and Game Controller", and right-click the yellow under "Sound, ** and Game Controller"? Options, select "Update Driver", open "Hardware Update Wizard", remove the check box before "Search for removable **", check "Install from the list or specified location" --Next", check "Include this location in the search", add the path of the sound card driver folder in the drop-down list box d:--Next", and the system will automatically search for and install the sound card driver in your specified location.

The sound card is not driven, and the sound card is generally integrated, so install your motherboard driver.

Your sound card model may be rare.

You look at the model number on the Internet.

It is recommended to go to the drive house.

Install a sound card driver and you're good to go.

It's generally AC'97 of

Sound is produced by the vibration of an object.

Sound travels in the form of sound waves, which are simply the motion formed by sound waves propagating through solids or liquids, gases. Sound waves vibrate the ossicles of the inner ear, and these vibrations are converted into tiny electronic brain waves, which are the sounds we perceive.

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.

All kinds of sounds in the air, whatever form they take, are caused by the vibrations of objects: when the drum is beaten, the sound of the drum is heard, and the vibration of the drum surface can be felt; A person is able to speak because of the vibration of the vocal cords of the throat; The sound of a steam whistle and the roar of a jet plane is caused by the vibration of the gas during exhaust. In conclusion, the vibration of an object is the source of the sound, and the object that emits the sound is called the sound source.

The sound emitted by the sound source must pass through an intermediate medium, and the most familiar medium is air, which can transmit sound in addition to gases, liquids and solids. The speed at which vibrations propagate through a medium is called the speed of sound, and the speed of sound in any medium depends on the elasticity and density of the medium, so the speed at which sound travels in different media is different: in liquids and solids it is generally much faster than in air, for example 1450 ms in water and 5000 ms in copper.

The speed at which sound travels through the air also increases with the temperature of the air.

The vibrations of the air that are moving forward are called sound waves, and the space in which sound waves propagate is called the sound field. When the sound vibration propagates in the air, the space-time temperament point is not taken away, it just vibrates back and forth near the original position, so the propagation of sound refers to the transmission of vibration. If the amplitude of the vibration of the object changes with time like a sinusoidal curve, then this vibration is called simple harmonic vibration, and the surrounding air particles also vibrate when the object is simple harmonic vibration.

The distance of the object from the resting position is called displacement, the maximum displacement is called the amplitude, the relationship between the displacement of the simple harmonic vibration and the time is expressed as = sin(2 ft+), where f is the frequency, (2 ft+ is called the phase angle of the simple harmonic vibration, it is an important physical quantity that determines the motion state of the object, and the amplitude determines the strength of the sound.

The number of times an object vibrates in a second is called frequency and is measured in hertz (Hz). The more vibrations per second and the higher the frequency, the sharper or more pitched the sound is heard by the human ear. The human ear is not perceptible to vibrations at all frequencies.

Generally speaking, the human ear can only hear sound with a frequency of 20 20000Hz, and the sound in this frequency range is usually called audio sound. Sounds below 20Hz are called infrasound, and sounds above 20,000Hz are called ultrasound. Neither infrasound nor ultrasound can be heard by the human ear, but there are some animals that can hear it, such as mice that can hear infrasound and bats that can feel ultrasound.

The distance between two adjacent compression or expansion zones in a sound wave is called wavelength and is measured in meters (m). Wavelength is the distance traveled by sound in the time of a cycle. The wavelength is inversely proportional to the frequency, with the higher the frequency, the shorter the wavelength; The lower the frequency, the longer the wavelength.

Sound is produced by mechanical vibrations.

For example, the vibration of the human vocal cords will cause the vibration of the surrounding air, and the vibration of the air can travel in the air, which is sound.

The vibration of the emitter produces sound, but not all sounds can be heard, sound propagation requires a medium, and the frequency range of sound corresponding to human hearing is 20 20000Hz

Sound is transmitted through the vibration of objects, and this is the expert answer.

Caused by the vibration of an object.

All of them are caused by the vibration of the object.

Sound is transmitted through the vibration of objects.

Sound is made by vibration!!

The sound is circuitous, and the sound from downstairs can be transmitted upstairs through cracks such as windows. We shout in front of the building, and the people in the back of the building can also hear the shouting, which is the roundabout nature of the voice.

The sturdy solid floor slab conducts sound, so that the sound from downstairs can be transmitted upstairs. In ancient times, there was no modern communication equipment such as ** and mobile phones, when the enemy attacked, the soldiers put their ears on the ground, and they could hear the sound of horses' hooves and footsteps of the enemy approaching in the distance, and the solid ground could conduct sound. Similarly, the two sides of a solid wall speak easily and are easy to hear, while the two sides of a hollow wall are blurred.

Sound insulation materials are divided into several categories:

1. Porous materials, which are the most commonly used materials in engineering. Example: mineral wool, glass wool, foam, felt, perlite, etc.

2. Plate-like material. Example: plywood, asbestos cement board, gypsum board, rigid board, etc.

3. Forming ceiling sound-absorbing panels. Example: mineral wool acoustic panels, glass wool acoustic panels, soft fiberboard.

4. Membrane material. Examples: plastic film, canvas flushing oak rental, artificial leather. Leather.

5. Flexible materials. Example: The sea is like a loss, latex block.

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 substance.