Mod 1 Unit 2 (Power, Amp, Intensity)

Question 1

Effect of frequency on
wavelength

Answer 1

low frequency = longer wavelength
high frequency = shorter wavelength

Question 2

Effect of propagation velocity on wavelength

Answer 2

lower PV = shorter wavelength
higher PV = longer wavelength

Question 3

What is amplitude?

Answer 3

strength of sound/how loud

Question 4

What is intensity?

Answer 4

energy transfer over an area

Question 5

Amplitude equation

Answer 5

amp=max-mean, mean-min, or max-min/2

Question 6

Frequency corresponds to

Answer 6

pitch

Question 7

Frequency and amplitude relationship

Answer 7

high f = more attenuation = decrease waves amp

Question 8

Power is proportionate to

Answer 8

amp^2

Question 9

Benefits of higher power

Answer 9

increased penetration and SNR ratio (better images)

Question 10

Drawback of higher power

Answer 10

bioaffects

Question 11

Intensity=

Answer 11

P/A

Question 12

How propagation speed of sound is determined

Answer 12

characteristics of the medium in particular the density and Bulk Modulus (BM) aka stiffness (elasticity, compressibility)