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  2. Chalkboard scraping - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_scraping

    In contrast, humans are less averse to the white noise than to scraping. [4] A 1986 study used a tape-recording of a three-pronged garden tool similar to a fork being "grided" across a chalkboard, which roughly reproduces the sound of fingernails on chalkboard. The recording was then manipulated, removing pitches at the extremities and the median.

  3. Joint cracking - Wikipedia

    en.wikipedia.org/wiki/Joint_cracking

    Cracking finger joints makes a distinct cracking or popping sound. Joint cracking is the manipulation of joints to produce a sound and related "popping" sensation. It is sometimes performed by physical therapists , chiropractors , and osteopaths [ 1 ] pursuing a variety of outcomes.

  4. Signs and symptoms of Parkinson's disease - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms_of...

    It is a pronation–supination tremor that is described as "pill-rolling"; that is, the index finger of the hand tends to get into contact with the thumb, and they perform a circular movement together. [1] [2] Such term was given due to the similarity of the movement in PD patients with the former pharmaceutical technique of manually making ...

  5. Neurologists reveal 15 subtle migraine symptoms — that aren't ...

    www.aol.com/neurologists-reveal-15-subtle...

    Sensitivity to light or sound. Difficulty reading or speaking. Hyperactivity. While some of these behaviors, particularly cravings, were once thought of exclusively as migraine triggers, "there's ...

  6. 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.

  7. Doctors Say This Nighttime Behavior Can Be A Sign Of Dementia

    www.aol.com/lifestyle/doctors-nighttime-behavior...

    There are plenty of reason you might feel off in the late afternoon and evening. Maybe you’re mentally wiped after socializing all day, or your brain is fried from hours of work.

  8. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    Today's spangram is horizontal (right to left). Related: The 26 Funniest NYT Connections Game Memes You'll Appreciate if You Do This Daily Word Puzzle. What Are Today’s NYT Strands Hints?

  9. List of gestures - Wikipedia

    en.wikipedia.org/wiki/List_of_gestures

    Simultaneous finger guns with both hands can also be used to underscore the punchline of a joke, something of a visual equivalent to a "rimshot" sound effect. Finger heart is a hand gesture in which the subject has a palm up fist, raises their index finger and brings their thumb over it so as to form a small heart shape. It signals a similar ...