Ultrasound refers to a sound wave with a frequency greater than the upper limit of human hearing, which is generally over 20 kHz. In general, humans can hear sounds with a frequency between 20 Hz and 20 kHz.
Victoria Island is situated in the Canadian Arctic Archipelago. It is the second largest island of Canada. It covers an area of 217,291 square km. The largest island of Canada is the Baffin Island.
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