Human whistling is the production of sound by means of carefully controlling a stream of air flowing through a small hole. Whistling can be achieved by creating a small opening with one's lips and then blowing or sucking air through the hole. The air is moderated by the lips, tongue, teeth or fingers (placed over the mouth) to create turbulence, and the mouth acts as a resonant chamber to enhance the resulting sound by acting as a type of Helmholtz resonator, producing a pure tone like a sine wave. Whistling can also be produced by blowing air through enclosed, cupped hands or through an external instrument, such as a whistle or even a blade of grass or leaf.

Read more about WhistlingMusical/melodic Whistling, Functional Whistling, Superstition, Whistling Competitions, Popular Culture, Children's Television Cartoon Shows

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... is the term used for the highest level of human oral mouth whistling ... the words "pucker" and "piccolo" and it refers to a level of skill and talent in human whistling which produces notes and tones that are so clear and precise, they remind the listener of someone ... the puccalo is distinguished from casual whistling, and places the instrument at the same prestige as other musical instruments ...
Acacia Drepanolobium
... Acacia drepanolobium, commonly known as Whistling Thorn (family Fabaceae), is a swollen-thorn acacia native to East Africa ... The whistling thorn grows up to 6 meters tall ... ants have made entry/exit holes, they create a whistling noise ...

Famous quotes containing the word whistling:

    For awhile after you quit Keats all other poetry seems to be only whistling or humming.
    F. Scott Fitzgerald (1896–1940)

    So the old flute was doomed and its fate was pathetic,
    ‘Twas fastened and burned at the stake as heretic,
    While the flames roared around it they heard a strange
    ‘Twas the old flute still whistling ‘The Protestant Boys’.
    —Unknown. The Old Orange Flute (l. 37–40)

    Never since the middle summer’s spring
    Met we on hill, in dale, forest, or mead,
    By pavèd fountain or by rushy brook,
    Or in the beachèd margent of the sea
    To dance our ringlets to the whistling wind,
    But with thy brawls thou hast disturbed our sport.
    William Shakespeare (1564–1616)