Production and use of ultrasound
24.1What the syllabus asks of you
- understand that a piezo-electric crystal changes shape when a p.d. is applied across it and that the crystal generates an e.m.f. when its shape changes
- understand how ultrasound waves are generated and detected by a piezoelectric transducer
- understand how the reflection of pulses of ultrasound at boundaries between tissues can be used to obtain diagnostic information about internal structures
- define the specific acoustic impedance of a medium as Z = ρc, where c is the speed of sound in the medium
- use IR / I0 = (Z1 – Z2)² / (Z1 + Z2)² for the intensity reflection coefficient of a boundary between two media
- recall and use I = I0e–μx for the attenuation of ultrasound in matter
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Chapter 24: Production and use of ultrasound
Drill this topic
All 33 questions on Production and use of ultrasound, untimed — answer on paper, then mark yourself against the mark scheme.
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Choose the years and how many questions, then print it with the answers on separate pages.
33 questions
These are structured questions, answered in working rather than by picking an option, so they are not listed here one by one. The drill above puts each in front of you with its mark scheme to check against.