|Radar Arrives | Cubase 5|
|Friday, 30 October 2009 00:00|
The rate of repetition of the CYCLEs of a PERIODIC quantity, such as a SOUND WAVE. Thus, frequency is the inverse of the PERIOD. More generally, frequency can be thought of as the rate of change of PHASE.
The adjustment of the FREQUENCY of strings or pipes of musical instruments to conform to a given SCALE, or the adjustment of other instruments to such a tuned instrument.
Any process that encourages a person to listen more discriminately, particularly to sounds of the environment. The term was originally used by R.M. Schafer in his book Ear Cleaning (Toronto, BMI Canada, 1967) to contrast with the traditional practice of ear training in music education which concentrates on the identification and reproduction of intervals, chords, melodies and so on.
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.