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  2. Infrasound - Wikipedia

    en.wikipedia.org/wiki/Infrasound

    Infrasound, sometimes referred to as low frequency sound, describes sound waves with a frequency below the lower limit of human audibility (generally 20 Hz, as defined by the ANSI/ASA S1.1-2013 standard). [ 1] Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be ...

  3. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    Electromagnetic spectrum. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light ...

  4. List of medical roots, suffixes and prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_medical_roots...

    infra-below Latin īnfrā, below infrahyoid muscles: inter-between, among Latin inter: interarticular ligament: intra-within Latin intrā: intramural: ipsi-same Latin ipsi-ipsilateral: irid(o)-of or pertaining to the iris: Latin īrīs, rainbow; from Greek ἶρις (îris), rainbow iridectomy: isch-restriction Greek ἴσχω (ískhō), hold ...

  5. List of Latin phrases (I) - Wikipedia

    en.wikipedia.org/wiki/List_of_Latin_phrases_(I)

    infra dignitatem (infra dig) beneath (one's) dignity: ingenio stat sine morte decus: the honors of genius are eternal: Propertius, Elegies Book III, 2 initium sapientiae timor Domini: the fear of the Lord is the beginning of wisdom: Psalm 111:10. Motto of the University of Aberdeen, Scotland. iniuriae qui addideris contumeliam: you who have ...

  6. Infrared - Wikipedia

    en.wikipedia.org/wiki/Infrared

    Infrared communications are useful for indoor use in areas of high population density. IR does not penetrate walls and so does not interfere with other devices in adjoining rooms. Infrared is the most common way for remote controls to command appliances. Infrared remote control protocols like RC-5, SIRC, are used to communicate with infrared.

  7. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor ( PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...

  8. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...

  9. Swarmbotics founders grew 'obsessed with robot swarms' and ...

    techcrunch.com/2024/08/19/swarmbiotics-founders...

    Swarmbotics was founded last summer by Stephen Houghton and Drew Watson, who met while working at autonomous trucking company Embark Trucks, where Houghton was COO and Watson led product operations.