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29 Pages • Complete Study Notes • Year: Pre-2021
Humans can hear sound waves with a frequency between 20 - 20 000 Hz. Sound waves with a higher frequency are called ultrasound, and are too high pitched for the human ear to hear. Describe the piezoelectric effect and the effect of using an alternating potential difference with a piezoelectric crystal piezoelectric effect: Where mechanical vibrations of a substance are converted into electric signals and vice versa Piezoelectric materials (quartz or barium titanate for example) are made up of dipole molecules in a lattice formation.
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