Ultrasound

Question 1

What is ultrasoud

Answer 1

• Sound that vibrates at frequencies above 20000 Hz

Question 2

How can ultrasound be produced

Answer 2

• Using electrical oscillations which are converted and transmitted as ultrasound waves using a speaker

Question 3

What is partial reflection

Answer 3

• When an ultrasoundw wave reaches a boundary between two mediums, some waves are reflected straight back while some are transmitted and refracted

Question 4

Are ultrasound waves harmful?

Answer 4

• No, there is no risk of radiation

Question 5

How do ultrasound machines work?

Answer 5

• Use an ultrasound device to transmit and receive ultrasound waves
• When the wave reaches a boundary (e.g: between tissue and the foetus), the wave is partially reflected and received by the ultrasound receiver
• These echoes and distributions are processed to provide a live image

Question 6

How is ultrasound used in industry?

Answer 6

• Ultrasound is used in industry to check the quality of products
• If ultrasound waves are transmitted through a solid object and reflected back before the boundary then we know that there is a crack in the product