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  2. The 7 Best Wireless Surround Sound Systems for an ... - AOL

    www.aol.com/best-wireless-surround-sound-systems...

    Best Wireless Surround Sound Systems. Best for Audio Fanatics: Nakamichi Shockwafe Elite. Best Theater Sound: Sony HT-A7000. Best Value: VIZIO M-Series 5.1. Best Upgrade For A Wired System ...

  3. Surround sound - Wikipedia

    en.wikipedia.org/wiki/Surround_sound

    Surround sound. Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener ( surround channels ). Its first application was in movie theaters. Prior to surround sound, theater sound systems commonly had three screen channels of sound that ...

  4. Quadraphonic sound - Wikipedia

    en.wikipedia.org/wiki/Quadraphonic_sound

    Quadraphonic sound. Quadraphonic (or quadrophonic and sometimes quadrasonic) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space. The system allows for the reproduction of sound signals that are (wholly or in part) independent of one ...

  5. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...

  6. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...

  7. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    A microphone, colloquially called a mic (/ m aɪ k /), [1] or mike, [a] is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound ...

  8. THX - Wikipedia

    en.wikipedia.org/wiki/THX

    THX Ltd. is an American audio company based in the San Francisco Bay Area. It is known for its eponymous suite of high fidelity audiovisual reproduction standards for movie theaters, screening rooms, home theaters, computer speakers, video game consoles, car audio systems, and video games. The THX trailer that precedes compliant films is based ...

  9. Sound reinforcement system - Wikipedia

    en.wikipedia.org/wiki/Sound_reinforcement_system

    A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience. [1] [2] In many situations, a sound reinforcement system is also ...