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  2. Sound - Wikipedia

    en.wikipedia.org/wiki/Sound

    Noise is a term often used to refer to an unwanted sound. In science and engineering, noise is an undesirable component that obscures a wanted signal. However, in sound perception it can often be used to identify the source of a sound and is an important component of timbre perception (see below).

  3. Musical instrument classification - Wikipedia

    en.wikipedia.org/wiki/Musical_instrument...

    The criteria for classifying musical instruments vary depending on the point of view, time, and place. The many various approaches examine aspects such as the physical properties of the instrument (shape, construction, material composition, physical state, etc.), the manner in which the instrument is played (plucked, bowed, etc.), the means by which the instrument produces sound, the quality ...

  4. Noise pollution - Wikipedia

    en.wikipedia.org/wiki/Noise_pollution

    Noise pollution, or sound pollution, is the propagation of noise or sound with potential harmful effects on humans and animals.The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems.

  5. Phonics - Wikipedia

    en.wikipedia.org/wiki/Phonics

    Reading by using phonics is often referred to as decoding words, sounding-out words or using print-to-sound relationships.Since phonics focuses on the sounds and letters within words (i.e. sublexical), [13] it is often contrasted with whole language (a word-level-up philosophy for teaching reading) and a compromise approach called balanced literacy (the attempt to combine whole language and ...

  6. Sound level meter - Wikipedia

    en.wikipedia.org/wiki/Sound_level_meter

    Sound level meters are commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental, mining and aircraft noise. [2] [3] The current international standard that specifies sound level meter functionality and performances is the IEC 61672-1:2013. However, the reading from a ...

  7. Commonwealth leaders say 'time has come' for discussion on ...

    www.aol.com/news/king-charles-queen-camilla...

    APIA, Samoa (Reuters) -Commonwealth leaders, ending a week-long summit in Samoa, said on Saturday the time had come for a discussion on whether Britain should commit to reparations for its role in ...

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  9. Music - Wikipedia

    en.wikipedia.org/wiki/Music

    Music is the arrangement of sound to create some combination of form, harmony, melody, rhythm, or otherwise expressive content. [1] [2] [3] Music is generally agreed to be a cultural universal that is present in all human societies. [4] Definitions of music vary widely in substance and approach. [5]