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A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the bass pitch of the tone moving upward or downward, it is referred to as the Shepard scale.
On every quarter-hour it strikes the number of quarter hours audibly on a gong, and then the number of hours since the last hour on a second gong. For instance, in a 3 weight Vienna regulator wall clock, at 6:15 it would strike once on a high pitched gong, then strike six times on a lower pitched gong.
Sound propagates as mechanical vibration waves of pressure and displacement, in air or other substances. [5] In general, frequency components of a sound determine its "color", its timbre . When speaking about the frequency (in singular) of a sound, it means the property that most determines its pitch . [ 6 ]
A cacophony of high pitched beeps and blasting symphony music – emanating from speakers on the building at the street corner – make most passersby not want to stay too long.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 December 2024. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...
Treble describes tones of high frequency or high pitch, ranging from 6 kHz to 20 kHz, [1] comprising the higher end of the human hearing range. In music, this corresponds to high notes. The treble clef is often used to notate such notes. [2] Treble sound is the counterpart to bass sound.
Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung sounds. [2]
Fallout expected within the hour High-pitched pip signal followed by the spoken message. For example: "Fallout warning GREY, Canterbury!" Sound siren producing one long note but interrupted in short succession. Can also be given by church bells or word of mouth from the police and civil defence wardens Fell out of use by the late 1960s All clear
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