Most surround sound computer speaker systems include one or two center speakers and two or more satellite speakers that are positioned so that sound emits from all directions.
Speakers typically have tone and volume controls, allowing users to adjust settings. To boost the low bass sounds, surround sound speaker systems also include a subwoofer. In many cases, a cable connects the speakers or the subwoofer to a port on the sound card. A transmitter connects to the sound card, which wirelessly communicates with the speakers. |
The difference of headphones and earbuds is that:
Headphones cover or are placed outside of the ear while Earbuds or earphones rest inside the ear canal. A headset is a device that functions as both headphones and a microphone. Computer and smart phone users wear a headset to free their hands for typing and other activities while talking or listening to audio output. Voice output occurs when you hear a person’s voice or when the computer talks to you through the speakers on the computer. |
Data Projectors
A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen so that an audience can see the image clearly. Some data projectors are large devices that attach to a ceiling or wall in an auditorium. Others, designed for the mobile user, are small portable devices that can be transported easily.
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Interactive whiteboards
An interactive whiteboard is a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen. A presenter controls the computer program by clicking a remote control, touching the whiteboard, drawing on or erasing the whiteboard with a special digital pen and eraser, or writing on a special tablet. Interactive whiteboards, which are hung on the wall or mounted on a stand, range in size from 48 to 94 inches. A widely used interactive whiteboard is the SMART Board.
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