RIU 320 Lecture Notes - Lecture 77: Acoustic Wave, Decibel, Reflection Coefficient
2 Oct 2020
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How many decibels is this change in intensity: -3db; a decline in intensity to one-half of the original level is a change of -3db, the power in a wave is increased to ten times its original value. Each 10 db indicates a tenfold increase: the intensity of an ultrasound wave is changed by -6db. This means that the current intensity is ___________ as much as its original level: ; each -3 db change means that of the original intensity remains. Attenuation, reflection, and scattering: as sound propagates through a medium, the total power in the wave decreases. What is this entire process called: attenuation, attenuation is determined by which of the following factors, path length and frequency of sound, an acoustic wave is traveling through soft tissue. It is now as large; six decibels of attenuation is made up of two groups of - 3db.
