What is a sound device?
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If you have xp you should be able to plug and play.  Go to your control panel and click on sound and audio devices. Go to speaker settings advanced and make sure you have everything set up correctly.  If not set it up on the right devices and restart computer.  If this doesnt work you might want to make sure you have actual hardware on your computer like a sbwave sound device.  Youcan check this by going into sound devices and clicking on the hardware tab.
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It is an inbuilt feature in Windows Operating Systems.  Go to Start Menu/Programs/Accessories/Entertainment/Sound Recorder.  It is there.\n\nIf it doesn't meet your need, search for voice recording software. I found an excellent list on the website below:\n\nhttp://www.freedownloadmanager.org/downloads/voice_recorder_software/
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Sound engineers are people who operate recording equipment, typically in a recording studio. They are trained in the techniques of multi-track recording, and have a wide knowledge of microphone types, soundwaves,  analog and digital recorders, and how to shape the soundwaves and patterns of musical instrumentation into something pleasant and audible.\n\nA sound engineer is usually the guy you always see behind the big mixing board whenever you see a picture of a rock band in a sound booth.
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sound is the vibration of the air and it's relationship to the ear drum.....no air.......no sound
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As said, a sound card is a piece of hardware (a physical object) to be inserted in your PC. So you cannot dowload it from the net. However you can buy one from vendor sites.\nIf you've got the hardware and are searching for drivers (a software to let the PC recognize n command the hardware to do specific tasks) to install the card, then www.drivers.com is the best, or refer to the particular vendor site of your card's make.\nHope that resolves your query
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sound, any disturbance that travels through an elastic medium such as air, ground, or water to be heard by the human ear. When a body vibrates, or moves back and forth (see vibration), the oscillation causes a periodic disturbance of the surrounding air or other medium that radiates outward in straight lines in the form of a pressure wave. The effect these waves produce upon the ear is perceived as sound. From the point of view of physics, sound is considered to be the waves of vibratory motion themselves, whether or not they are heard by the human ear.
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A sound driver enables the computer to know that the computer actually has a device that will alow sound. Usually, the device comes with an Installation CD, which is basic to install, if its an onboard sound device, then the driver is on the motherboard installation cd.
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Go to start, control panel, sounds and audio devices. Click on the sounds tab. In the box toward the bottom it lists all the things associated with sounds. The ones with a bell looking thing next to them are on. Just click on the word and then under that click on the little arrow next to the browse button to hear what sound it is.
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What do you want to know? Its a portable data aquisition device typically used for vibration monitoring. They are not real common.
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You can go to your control panel and click on your "Sound and audio devices" icon doing so will get you the "Sound and audio devices Properties" in this window go to the Audio tab in the top and see if any thing is listed under the default device if there is nothing listed try clicking the drop down menu but if you see the menu has been disabled that mean your sound card driver have been corrupted. If your sound card is an internal sound card inbuilt on your mother board then try using your mother board CD and install the audio driver... I think this will work. \n\nBest Of luck
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When people refer to "amplifiers," they're usually talking about stereo components or musical equipment. But this is only a small representation of the spectrum of audio amplifiers. There are actually amplifiers all around us. You'll find them in televisions, computers, portable CD players and most other devices that use a speaker to produce sound. \nIn this article, we'll see what amplifiers do and how they do it. Amplifiers can be very complex devices, with hundreds of tiny pieces, but the basic concept behind them is pretty simple. You can get get a clear picture of how an amplifier works by examining the most basic components. \n\nYou can continue reading the article by accessing the link below.
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Noise is any unwanted signal\nMusic is a periodic signal and can be noise or non corrosponding to the listner
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Sound is a disturbance of mechanical energy that propagates through matter as a wave. Sound is characterized by the properties of sound waves, which are frequency, wavelength, period, amplitude and velocity or speed.\n\nBy sound, we commonly mean the vibrations that travel through air and can be heard by humans. However, scientists and engineers use a wider definition of sound that includes low and high frequency vibrations in air that cannot be heard by humans, and vibrations that travel through all forms of matter, gases, liquids and solids. The matter that supports the sound is called the medium. Sound propagates as waves of alternating pressure, causing local regions of compression and rarefaction. Particles in the medium are displaced by the wave and oscillate. The scientific study of sound is called acoustics.\n\nNoise and sound often mean the same thing; but noise is often used to refer to an unwanted sound. In science and engineering, noise is an undesirable component that obscures a signal\n\nSound is perceived through the sense of hearing. Humans and many animals use their ears to hear sound, but loud sounds and low-frequency sounds can be perceived by other parts of the body through the sense of touch. Sounds are used in several ways, notably for communication through speech or, for example, music. Sound can also be used to acquire information about properties of the surrounding environment such as spatial characteristics and presence of other animals or objects. For example, bats use echolocation, ships and submarines use sonar, and humans can determine spatial information by the way in which they perceive sounds.\n\nThe speed at which sound travels depends on the medium through which the waves are passing, and is often quoted as a fundamental property of the material. In general, the speed of sound is proportional to the square root of the ratio of the stiffness of the medium and its density. Those physical properties and the speed of sound change with ambient conditions. For example, the speed of sound in air and other gases depends on temperature. In air, the speed of sound is approximately 345 ms-1, in water 1500 ms-1 and in a bar of steel 5000 ms-1.
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input devices\ncds , keyboard , scanner web camera , mic. etc\noutput devices \nprinter , moniter , speakers , fax , etc\n i hope u know about them or u can search on the net u will get loads and loads of info on these
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go in device manager and look in sound video and game controller
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If you throw say your car keys on the kitchen table they will jangle making audible sounds you can hear and ultrasonic sounds with frequencies too high for you to hear.  An ultrasonic listening device can "hear" the sounds you can't hear.  For example truck drivers may point an ultrasonic test device at their tires to hears air leaks that humans can not hear.  The pickup is like a sensative small microphone.  Perhaps you can use a search engine to find "ultrasonic tester" etc.  Good luck.
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Ususally it's in:\nStart-->All Programs-->Accesories-->Entertainment-->Sound Recorder\n-----\nWonder Person