Compared to audible sound waves, ultrasound waves have

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higher speed.

higher frequency.

longer wavelength.

both higher speed and frequency.

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Answer is Wrong!

This question was previously asked in

UPSC NDA-2 – 2019

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The correct option is B) higher frequency.

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.

The speed of sound in a given medium is generally constant for all frequencies. The relationship between speed (v), frequency (f), and wavelength (λ) is v = fλ. Since ultrasound has a higher frequency (f) than audible sound in the same medium with constant speed (v), its wavelength (λ) must be shorter. Therefore, compared to audible sound waves, ultrasound waves have higher frequency and shorter wavelength, but the speed remains the same in the same medium.

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