An audio signal is a representation of sound, typically as an electrical voltage for analog signals and a binary number for digital signals. Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz (the limits of human hearing). Audio signals may be synthesized directly, or may originate at a transducer such as a microphone, musical instrument pickup, phonograph cartridge, or tape head. Loudspeakers or headphones convert an electrical audio signal into sound.
- Apple iPod
VIDEO CONFERENCING SOLUTION
Visual multimedia source that combines a sequence of images to form a moving picture. The video transmits a signal to a screen and processes the order in which the screen captures should be shown. Videos usually have audio components that correspond with the pictures being shown on the screen.
- Cisco Tandberg
- Google CFM
A display is a computer output surface and projecting mechanism that shows text and often graphic images to the computer user, using a cathode ray tube ( CRT ), liquid crystal display ( LCD ), light-emitting diode, gas plasma, or other image projection technology.
- Mitashi LED & LCD TVs
- Samsung LFD
IP phone is a hardware- or software-based telephone designed to use voice over IP (VoIP) technology to send and receive phone calls over an IP … They also have additional performance requirements because phone calls are placed over the internet instead of the legacy public switched telephone network (PSTN).
A projector is an output device that can take images generated by a computer or Blu-ray player and reproduce them onto a screen, wall, or other surface. Typically, the surface projected onto is large, flat, and lightly colored. … Projectors can produce either still (slides) or moving images (videos).
TV Accessories for your TV. HDMI Cable. HDMI cables can give you that extra clear picture for your high-definition television. Universal Remote Control. Sound Bar. Blu-ray Player. HDTV Aerial Antenna. 3D Glasses. Streaming HD Player. LED Video Projector.
- Apple TV