Ultrasound waves
- Created by: Emilyburkee
- Created on: 04-05-21 14:40
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- Ultrasound
- ultrasound was have a higher frequency than what people can hear
- have a wavelength of 1mm- low res
- producing ultrasound
- piezoelectric crystals
- when a pd is applied across the crystals they mechanically deform- producing a pd
- used in transducers
- generate ultrasound pulses of a specific frequency
- to detect reurning echos of ultrasound waves
- transducers
- a.c current applied and causes forced vibrations
- frequency of the vibrations = F of P.D
- amplitude at its max when frequency = natural frequency of the crystal
- emits ultrasound waves
- damping material used for pulses
- emits ultrasound waves
- piezoelectric crystals
- ultrasound reflection
- when pulses reach an interface
- size of echo depends on material and properties
- acoustic impedance = velocity x density
- greater the diff = greater echo
- when pulses reach an interface
- ultrasound was have a higher frequency than what people can hear
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