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  2. Audio headset - Wikipedia

    en.wikipedia.org/wiki/Audio_headset

    General 3.5 mm computer headsets come with two 3.5 mm connectors: one connecting to the microphone jack and one connecting to the headphone/speaker jack of the computer. 3.5 mm computer headsets connect to the computer via a sound card, which converts the digital signal of the computer to an analog signal for the headset. USB computer headsets ...

  3. Wireless microphone - Wikipedia

    en.wikipedia.org/wiki/Wireless_microphone

    A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

  4. A Skylit Drive - Wikipedia

    en.wikipedia.org/wiki/A_Skylit_Drive

    A Skylit Drive is an American post-hardcore band from Lodi, California. [4] The band has released one DVD, one EP and five studio albums: Wires...and the Concept of Breathing (2008), Adelphia (2009), Identity on Fire (2011), Rise (2013) and, most recently, ASD (2015).

  5. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    It consisted of a microphone in one location and a remote listening post with a speaker that could also be recorded using a phonograph. While also marketed as a device that allowed broadcasting of sounds, or dictating text from one room to a typist in another, it was used in several criminal investigations. [8] [9]

  6. Contact microphone - Wikipedia

    en.wikipedia.org/wiki/Contact_microphone

    A contact microphone is a form of microphone that senses audio vibrations through contact with solid objects. [1] Unlike normal air microphones, contact microphones are almost completely insensitive to air vibrations but transduce only structure-borne sound.

  7. Laser microphone - Wikipedia

    en.wikipedia.org/wiki/Laser_microphone

    On 25 August 2009, U.S. patent 7,580,533 was issued for a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air ("Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in ...

  8. Skylight - Wikipedia

    en.wikipedia.org/wiki/Skylight

    A retractable skylight rolls (on a set of tracks) off the frame, so that the interior of the facility is entirely open to the outdoors, i.e., not impeded by a hinged skylight. The terms retractable skylight and retractable roof are often used interchangeably, though skylight implies a degree of transparency. Tubular daylight device