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  2. NASA offers explanation for bizarre 'trumpet noise' phenomena

    www.aol.com/news/2015-05-22-nasa-attempts-to...

    Since this still lacks scientific confirmation, rampant speculation continues about potential extra-terrestrial theories for these "trumpet noises." But don't count NASA as a UFO-doubter just yet.

  3. Seven trumpets - Wikipedia

    en.wikipedia.org/wiki/Seven_trumpets

    Angels blowing trumpets at the end of the world was not limited to Christian theology. Islamic artwork features the Archangel Israfel blowing the nafir trumpet at the end the world. From the Mameluke Dynasty [15] In Christian Eschatology, all the first six trumpets are used to serve as a wake up call to the sinners on Earth and a call to ...

  4. Skyquake - Wikipedia

    en.wikipedia.org/wiki/Skyquake

    The sound may cause noticeable vibration in the ceiling or across a particular room. Those who experience skyquakes typically do not have a clear explanation for what caused them and they are perceived as mysterious. They have been heard in several locations around the world, typically in areas close to lakes and other bodies of water.

  5. List of unexplained sounds - Wikipedia

    en.wikipedia.org/wiki/List_of_unexplained_sounds

    Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.

  6. List of national instruments (music) - Wikipedia

    en.wikipedia.org/wiki/List_of_national...

    Straight trumpet without fingerholes, traditionally made from a trunk or thick branch of a tree, sometimes with a rim of beeswax around the blowing end, requires circular breathing: 423.121.11 Austria, Czechia. Bock [15] Bockpfeife: Use of goatskins in constructing the bag, similar to the common use of other goat-terms for bagpipes in other nations

  7. Gabriel's horn - Wikipedia

    en.wikipedia.org/wiki/Gabriel's_horn

    Graph of = /. Gabriel's horn is formed by taking the graph of =, with the domain and rotating it in three dimensions about the x axis. The discovery was made using Cavalieri's principle before the invention of calculus, but today, calculus can be used to calculate the volume and surface area of the horn between x = 1 and x = a, where a > 1. [6]

  8. History of the trumpet - Wikipedia

    en.wikipedia.org/wiki/History_of_the_trumpet

    Other trumpets are mentioned in the Bible besides the primitive shofar, a horn made from a ram's horn [4] whose sound supposedly [1] made the walls of Jericho fall down (Joshua 6); the taqowa' was a Jewish military trumpet which is mentioned in Ezekiel 7:14.

  9. Bugle call - Wikipedia

    en.wikipedia.org/wiki/Bugle_call

    Every duty around camp had its own bugle call, and since cavalry had horses to look after, they heard twice as many signals as regular infantry. " Boots and Saddles " was the most imperative of these signals and could be sounded without warning at any time of day or night, signaling the men to equip themselves and their mounts immediately.