Ultrasound Flashcards
1
Q
What is ultrasoud
A
- Sound that vibrates at frequencies above 20000 Hz
2
Q
How can ultrasound be produced
A
- Using electrical oscillations which are converted and transmitted as ultrasound waves using a speaker
3
Q
What is partial reflection
A
- When an ultrasoundw wave reaches a boundary between two mediums, some waves are reflected straight back while some are transmitted and refracted
4
Q
Are ultrasound waves harmful?
A
- No, there is no risk of radiation
5
Q
How do ultrasound machines work?
A
- 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
6
Q
How is ultrasound used in industry?
A
- 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