| ultrasonic |
having to do with frequencies of sound above normal human hearing, generally accepted to be at 20KHz to 2MHZ and above, but also extended down to the 5KHz to 20KHz range in certain processing applications (cf subsonic, supersonic, or transsonic, which have to do with the speed of sound).
출처: home.att.net/~Berliner-Ultrasonics/us-gloss.html
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|---|---|
| ultrasonics |
the application of ultrasonic energy to do work (specifically as opposed to subsonic, supersonic, or transsonic, qv).
출처: home.att.net/~Berliner-Ultrasonics/us-gloss.html
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| ultrasonic |
Term applied to sound frequencies above 20000 hertz, the normal upper limit of human hearing.
출처: www.nksd.net/schools/nkhs/staff/john_daneau/cp_glo...
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| ultrasonic |
Sound waves that are too high for humans to hear are "ultrasonic". The hearing range of many animals, including rodents, extends much higher than for humans.
출처: www.ccac.ca/en/CCAC_Programs/ETCC/GlossaryEng.htm
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| ultrasonic |
Having frequencies above the normal range of human hearing, ie, higher than about 20kHz.
출처: www.dilettantesdictionary.com/index.php
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