Analyzing Methods To create sonograms, why are ultrasound waves used instead of audible sound waves?

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smeachtaczm · Accepted Answer

In this question, our task is to explain why ultrasound is Used instead of audible sound to generate a sonogram.Ultrasound has a frequency of above   2.0  ×      10          4        H  z whereas audible sound is within the range   20  −  2.0  ×      10          4        H  z. Now suppose that they travel with the same speed, which is true in most cases, then the wavelength of an ultrasound is much smaller than that of an audible sound.In imaging techniques which make use of waves, one prerequisite is that the wavelength of the wave should be smaller than or comparable to the object to image. If the wavelength is much longer, then the resolution of the image is poorer. For instance, we cannot see an atom with the naked eye since the wavelength of visible light is much longer than the diameter of an atom.Thus, in order to capture some aspects of our tissues, and internal organs, we should make use of short-wavelength sound waves. This is achieved when we use ultrasounds.

Analyzing Methods To create sonograms, why are ultrasound waves used instead of audible sound waves?

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