a) Speakers
Speakers allow you to hear audio that is music, voice and other sounds. Most personal computers and mobile devices have a small internal speakers. Many users attach higher-quality speakers to their computers and mobile devices including game consoles.
So that only you can hear sound, you can listen through car buds or headphones, which cover or are placed outside of the ear. Both earbuds and headphones usually include noise-cancelling technology to reduce the interference of sounds from the surrounding environment. To eliminate the clutter of cords, users can opt for wireless speakers or wireless headphones.
b) Headphones and earbuds
Users can listen through headphones or earbuds so that only the individual wearing the headphones or earbuds hears the sound from the computer. The difference is that headphones cover or are placed outside of the ear, where earbuds rest in the ear canal. Both headphones and earbuds usually include noise-cancelling technology to reduce the interference of sounds from the surrounding environment.
A headset is a device that functions as both headphones and a microphone. Computer and smartphone users wear a headset to free their hands for typing and other activities while talking or listening to audio output. Many headsets communicate wirelessly with then computer or mobile device.
As an alternative to headphones, earbuds or headsets, you can listen to audio from mobile devices, such as a potable media player or smartphone, through speakers in a vehicle or on a stereo system at home or work. Or, you can purchase speakers specifically designed to play audio from the device.
c) Data projectors
A data projector is a device that takes the text and images displaying on a computer or mobile device screen and projects the images on a larger screen so that audience can see the image clearly. For example, many classrooms use data projectors so that all students easily can see an instructor’s presentation on the screen.
An LCD projector, which uses liquid crystal display technology, attaches directly to a computer or mobile device and uses its own light source to display the information shown on the computer screen. Because LCD projectors tend to produce lower-quality images, users often prefer DLP projectors for their sharper, brighter images.
A digital light processing (DLP) projectors uses tiny mirrors to reflect light, which produces crisp, bright, colorful images that remain in focus and can be seen clearly, even in a well-lit room. Some newer televisions uses DLP instead of LCD or plasma technology.
d) Interactive whiteboard
An interactive whiteboards is a large interactive display in the form factor of a whiteboard. It can either be a standalone of a whiteboard. It can either be a standalone touchscreen computer used independently to perform tasks and operations , or a connectable apparatus uses as a touchpad to control computers from a projectors . They are used in a variety of settings, including classrooms at all levels of education , in corporate board rooms and work groups, in training rooms and work groups , in training rooms for professional sports coaching, in broadcasting studios, and others.
Some of the benefits of using interactive whiteboards include group interaction. Interactive whiteboards promotes collaboration among students and groups discussion and participation. They can be an effective tool for brainstorming due to the fact that notes can be taken on the board and saved to be shared and distributed to students later.
e) Force-feedback game controllers and tactile output
Joystick, wheels, gamepads and motion-sensing game controllers are input devices used to control movements and actions of a player or object in computer games, simulations, and video games. These devices also functions as output devices when they include force feedback, which is a technology that sends resistance to the device in response from the device. For example, users may sense a bumping feeling on their hand while scrolling through a smartphone‘s contact list.
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