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  2. 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]

  3. Microcassette - Wikipedia

    en.wikipedia.org/wiki/Microcassette

    A Sony M-100MC Voice-Activated Mic n' Micro Microcassette Recorder and a microcassette Microcassettes were sometimes also used for storing digital data. For the programmable calculators of the HP-41-series (from 1979, r.), there was a magnetic tape storage device. Microcassettes have mostly been used for recording voice.

  4. Underwater locator beacon - Wikipedia

    en.wikipedia.org/wiki/Underwater_locator_beacon

    A 4-inch (100 mm) underwater locator beacon, with ballpoint pen for scale A ULB attached to a bracket on a cockpit voice recorder. An underwater locator beacon (ULB), underwater locating device (ULD), or underwater acoustic beacon is a device that emits an acoustic pulse intended to guide searchers equipped with a suitable receiver to the location of the beacon underwater.

  5. Cockpit voice recorders only record 2 hours at a time. The ...

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  6. Talkboy - Wikipedia

    en.wikipedia.org/wiki/Talkboy

    Talkboy is a line of handheld voice recorder and sound novelty toys manufactured by Tiger Electronics in the 1990s. [1] The brand began as a result of a promotional tie-in with the 1992 film Home Alone 2: Lost in New York; the most well-known product was the Deluxe Talkboy, a cassette recorder and player with a variable-speed voice changer that caused toy crazes over several holiday shopping ...

  7. Call-recording hardware - Wikipedia

    en.wikipedia.org/wiki/Call-recording_hardware

    If the recorder is on, the call is recorded on magnetic tape, and can be played back on compatible devices. Cassette tape recorders are used for small-scale use. Professional reel-to-reel recorders taking large tape spools and running at low tape speeds such as 15 ⁄ 16 inch per second (2.38 cm/s) were used for large-scale routine recording.

  8. Racal - Wikipedia

    en.wikipedia.org/wiki/Racal

    Racal Electronics plc was a British electronics company that was founded in 1950. Listed on the London Stock Exchange and once a constituent of the FTSE 100 Index, Racal was a diversified company, offering products including voice recorders and data recorders, point of sale terminals, laboratory instruments and military electronics, including radio and radar.

  9. Cassette deck - Wikipedia

    en.wikipedia.org/wiki/Cassette_deck

    The first consumer tape recorder to employ a tape reel permanently housed in a small removable cartridge was the RCA tape cartridge, which appeared in 1958 as a predecessor to the cassette format. At that time, reel-to-reel recorders and players were commonly used by enthusiasts but required large individual reels and tapes which had to be ...