Physics A-Level
Acoustic impedance and reflection
What Acoustic impedance and reflection means in Physics A-Level, as defined for AQA.
Definition of Acoustic impedance and reflection
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Reference: AQA
Echo amplitude depends on the acoustic impedance difference at a boundary, so larger mismatches produce stronger echoes.
Topics that use Acoustic impedance and reflection
- Ultrasound imaging (A-level only) (AQA A-Level)
Related terms
- A-scan
- Acoustic impedance
- Attenuation and penetration
- B-scan
- Comparison with X-ray, CT and MRI
- Coupling gel
- Intensity reflection coefficient
- Non-ionising safety
Using Acoustic impedance and reflection in the exam
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