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  2. Whistling - Wikipedia

    en.wikipedia.org/wiki/Whistling

    An offstage whistle audible to the audience in the middle of a performance might also be considered bad luck. Transcendental whistling ( chángxiào 長嘯) was an ancient Chinese Daoist technique of resounding breath yoga, and skillful whistlers supposedly could summon supernatural beings, wild animals, and weather phenomena.

  3. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    A trailing edge tone occurs when an exterior flow passes over a trailing edge. There is a whistle that is a combination of an edge tone and a trailing-edge tone and might be called a wake-edge tone. It occurs in rotating circular saws under idling conditions and may be called the circular-saw whistle. Under load conditions, blade vibration ...

  4. Steam whistle - Wikipedia

    en.wikipedia.org/wiki/Steam_whistle

    The Deutsche Reichsbahn of Germany introduced another whistle design in the 1920s called "Einheitspfeife", conceived as a single-note plain whistle which already had a very deep-pitched and loud sound, but if the whistle trigger is just pulled down half of its way an even lower tone like from a chime-whistle could also be caused. This whistle ...

  5. Noisemaker - Wikipedia

    en.wikipedia.org/wiki/Noisemaker

    A noisemaker is something intended to make a loud noise, usually for fun. Instruments or devices commonly considered "noisemakers" include: pea whistles; air horns, composed of a pressurized air source coupled to a horn, designed to create an extremely loud noise; fireworks, such as firecrackers, bottle rockets, bang snaps and others

  6. List of unexplained sounds - Wikipedia

    en.wikipedia.org/wiki/List_of_unexplained_sounds

    According to NOAA, the Whistle is similar to volcanogenic sounds previously recorded in the Mariana volcanic arc of the Pacific Ocean. NOAA also stated that locating the source of an event requires at least three recording instruments, and since the Whistle was only recorded on the NW hydrophone, the sound could have traveled a great distance ...

  7. Whistle register - Wikipedia

    en.wikipedia.org/wiki/Whistle_register

    The whistle register (also called the flute register or flageolet register) is the highest register of the human voice, lying above the modal register and falsetto register. This register has a specific physiological production that is different from the other registers and is so called because the timbre of the notes that are produced from ...

  8. Today's Wordle Hint, Answer for #1250 on Wednesday, November ...

    www.aol.com/lifestyle/todays-wordle-hint-answer...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1250 ahead. Let's start with a few hints.

  9. Theatrical superstitions - Wikipedia

    en.wikipedia.org/wiki/Theatrical_superstitions

    Related to a similar rule for sailing ships, it is considered bad luck for an actor to whistle on or off stage. As original stage crews were hired from ships in port (theatrical rigging has its origins in sailing rigging), sailors, and by extension theatrical riggers, used coded whistles to cue scene changes. Actors who whistled could confuse ...

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