Question

The properties of ultrasound that make it useful is/are

• A. high power and high speed.
• B. high power and good directivity.
• C. high frequency and high speed.
• D. high frequency and bending around the objects.

Answer 1

Answer: (B)

high power and good directivity.
Answer is B.
he ultrasound waves have a shorter wavelength and thus don't spread out as rapidly. For this reason, the resulting directivity of the ultrasound devices is far higher than physically possible with any loudspeaker system.

High power ultrasound carry large energy which can break up stony deposits or tissue, accelerate the effect of drugs in a targeted area, assist in the measurement of the elastic properties of tissue, and can be used to sort cells or small particles for research.

Hence, high directivity and high power make ultrasound to be very useful.