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  2. Smiley face curve - Wikipedia

    en.wikipedia.org/wiki/Smiley_face_curve

    An idealized and extreme smiley face curve shown using a 29-band graphic equalizer. A smiley face curve or mid scoop [1] in audio signal processing is a target frequency response curve characterized by boosted low and high frequencies coupled with reduced midrange frequency power.

  3. Positive end-expiratory pressure - Wikipedia

    en.wikipedia.org/wiki/Positive_end-expiratory...

    Positive end-expiratory pressure (PEEP) is the pressure in the lungs (alveolar pressure) above atmospheric pressure (the pressure outside of the body) that exists at the end of expiration. [1] The two types of PEEP are extrinsic PEEP (PEEP applied by a ventilator) and intrinsic PEEP (PEEP caused by an incomplete exhalation).

  4. Pip-squeak - Wikipedia

    en.wikipedia.org/wiki/Pip-squeak

    Pip-squeak was a radio navigation system used by the British Royal Air Force during the early part of World War II.Pip-squeak used an aircraft's voice radio set to periodically send out a 1 kHz tone which was picked up by ground-based high-frequency direction finding (HFDF, "huff-duff") receivers.

  5. Bleep censor - Wikipedia

    en.wikipedia.org/wiki/Bleep_censor

    YouTube videos often have profanity bleeped or muted out as YouTube policy specifies that videos including profanities may be "demonetized" or stripped of ads. [10] Beginning in 2019, the bleep censor began to be more often used for censoring out words related to sensitive and contentious topics to evade algorithmic censorship online ...

  6. Bowman (communications system) - Wikipedia

    en.wikipedia.org/wiki/Bowman_(communications_system)

    Bowman is the name of the tactical communications system used by the British Armed Forces.. The Bowman C4I system consists of a range of HF radio, VHF radio and UHF radio sets designed to provide secure integrated voice, data services to dismounted soldiers, individual vehicles and command HQs up to Division level.

  7. High-frequency ventilation - Wikipedia

    en.wikipedia.org/wiki/High-frequency_ventilation

    HFPPV — High-frequency positive pressure ventilation is rarely used anymore, having been replaced by high-frequency jet, oscillatory and percussive types of ventilation. HFPPV is delivered through the endotracheal tube using a conventional ventilator whose frequency is set near its upper limits.

  8. High-frequency direction finding - Wikipedia

    en.wikipedia.org/wiki/High-frequency_direction...

    High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can effectively communicate over long distances; for example, between U-boats and their land-based headquarters.

  9. Full-range speaker - Wikipedia

    en.wikipedia.org/wiki/Full-range_speaker

    The audible severity of modest intermodulation distortion is not well established. The result is a degree of "frequency mixing", albeit at a relatively low level. A full range driver may have reduced output at both ends of its frequency range, or a more severely limited frequency response, resulting in a more compromised sound.