Physics A-Level
Pulse–echo principle
What Pulse–echo principle means in Physics A-Level, as defined for AQA.
Definition of Pulse–echo principle
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Reference: AQA
A pulse is emitted and echoes from boundaries are detected, used by both A-scans and B-scans with the same speed of sound in tissue.
Topics that use Pulse–echo principle
- Ultrasound imaging (A-level only) (AQA A-Level)
Related terms
- A-scan
- Acoustic impedance
- Acoustic impedance and reflection
- Attenuation and penetration
- B-scan
- Comparison with X-ray, CT and MRI
- Coupling gel
- Intensity reflection coefficient
Using Pulse–echo principle in the exam
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