Ultrasound waves are defined as sound waves with frequencies higher than the upper limit of human hearing, which is typically considered to be 20 kilohertz (kHz). Audible sound waves have frequencies between approximately 20 Hz and 20 kHz.
Compared to audible sound waves, ultrasound waves have
Asked in UPSC NDA 2 2019 · Topic: Sound (Ultrasound and Infrasound: Production, Properties, and Applications (SONAR, Medical, Industrial))
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