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  2. Diaphragm (acoustics) - Wikipedia

    en.wikipedia.org/wiki/Diaphragm_(acoustics)

    In an electrodynamic loudspeaker, a diaphragm is the thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap, vibrating the diaphragm, and producing sound. It can also be called a cone, though not all speaker diaphragms are cone-shaped. Diaphragms are also found in headphones. Quality midrange and bass drivers are ...

  3. RCA Type 77-DX microphone - Wikipedia

    en.wikipedia.org/wiki/RCA_Type_77-DX_microphone

    The RCA Type 77-DX microphone is a poly-directional ribbon microphone, or pressure-gradient microphone, introduced by the RCA Corporation in 1954. It was preceded by the Type 77-D introduced in 1948. [1] Its popularity and classic design has resulted in the 77-DX becoming an iconic microphone, used by broadcasters and media personalities such ...

  4. Acoustic suspension - Wikipedia

    en.wikipedia.org/wiki/Acoustic_suspension

    Acoustic suspension is a loudspeaker cabinet design that uses one or more loudspeaker drivers mounted in a sealed box. Acoustic suspension systems reduce bass distortion which can be caused by stiff suspensions required on drivers used for open cabinet designs. A compact acoustic suspension loudspeaker was described in 1954 by Edgar Villchur ...

  5. Mercedes-Benz E-Class (W212) - Wikipedia

    en.wikipedia.org/wiki/Mercedes-Benz_E-Class_(W212)

    Mercedes-Benz E-Class (W212) The W212 and S212 Mercedes-Benz E-Class series is the fourth generation of the E-Class range of executive cars which was produced by Mercedes-Benz between 2009 and 2016 as the successor to the W211 E-Class. The body styles of the range are either four-door sedan/saloon (W212) or a five-door estate/wagon (S212).

  6. Sound level meter - Wikipedia

    en.wikipedia.org/wiki/Sound_level_meter

    A sound level meter (also called sound pressure level meter (SPL)) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The best type of microphone for sound level meters is the condenser microphone, which combines precision with stability and reliability. [1] The diaphragm of the microphone responds to ...

  7. Ambisonics - Wikipedia

    en.wikipedia.org/wiki/Ambisonics

    Ambisonics. Ambisonics former trademark. Ambisonics is a full-sphere surround sound format: in addition to the horizontal plane, it covers sound sources above and below the listener. [1][2] Unlike some other multichannel surround formats, its transmission channels do not carry speaker signals.

  8. 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 ...

  9. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    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 recording, two-way radios, megaphones, and radio and television broadcasting.