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|Friday, 20 November 2009 00:00|
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The use of reflected SOUND WAVEs for obtaining environmental information. Certain animals, such as the bat and the porpoise, emit pulses of extremely high frequency sound (up to 50 kHz for bats, and up to 170 kHz for porpoises and whales) in narrow, intense streams. The REFLECTION, or ECHO, of these sounds supplies information regarding the nature and location of objects in the environment. When an emission of varying frequency is used, such as with bats, the echoes, travelling varying distances to the ear, are heard as different frequencies in each ear, thus supplying directional information.
A garden, and by analogy, any place of acoustic delights. This may be a natural soundscape, or one created according to the methods of SOUNDSCAPE DESIGN. The soniferous garden may also include as one of its principal attractions a Temple of Silence for meditation.
An ordering of a system of PITCHes, usually in ascending FREQUENCY order. The distance between any two pitches or NOTEs is called an interval.
The control of sound levels to ensure suitable placement between the lowest and highest distortion-free levels of an electroacoustical system.