Question

(a) What is ultrasound ? What is the difference between ordinary sound and ultrasound ?
(b) Write any three applications (or uses) of ultrasound.

Answer 1

Answer:

the sound of frequency greatest than 20kHz are called ultra sound

application( or uses)

ultrasound is wiedly used in imaging the human organ which is called ultrasonography

ultrasound is also used in sergury in caterect and in lethoscopy to break the stones from kidney

Answer 2

(a) Ultrasound waves are waves of sound at high frequency.

(b) In industry, medical check-up in hospitals and Ultrasound is used to track fetal growth within the uterus of mother.

Explanation:

(a) Ultrasound waves are waves of sound at high frequency. Because of the higher frequency, they can penetrate significantly into matter.

We may differentiate among ultrasonic and ordinary waves, such as:

Audible sound waves

• The frequencies are 20 Hz–20,000 Hz.
• For human ears certain noises are audible.

Ultrasound waves :

• The frequencies are above 20,000 Hz.
• To human ears, such noises are inaudible.

(b) We have Ultrasound applications as follows:

(i) In industry, ultrasound is used to detect defects in metal blocks, without damaging them.

(ii) Ultrasound is used as a medical check-up in hospitals to examine the human body's internal organs, such as the liver, kidneys and uterus.

(iii) Ultrasound is used to track fetal growth within the uterus of mother.

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