Sound

Question 0

Speed of sound

Answer 0

343.2 m/s

Question 1

Acoustic absorption rating

Answer 1

A quantitive value that represents a material’s ability to absorb sound waves

Question 2

Factors in sound speed

Answer 2

density and pressure (as a function of temperature)

Question 3

Doppler effect

Answer 3

Sound emminating from an object moving towards the observer is a a higher pitch
Sound emminating from an object moving away from the observer is at a lower pitch

Question 4

Sound pressure

Answer 4

A change in atmospheric pressure as a result of the sound wave

Question 5

Sound

Answer 5

An oscillation due to changes in pressure through a medium at a frequency within audible range

Question 6

Sound waves through gasses and liquids

Answer 6

Longitudinal waves (compression waves)

Question 7

Sound waves through solids

Answer 7

Transverse waves

Question 8

Longitudinal waves

Answer 8

Compresses the internal structure of the material as it passes through in the form of an oscillating pressure waves

Question 9

Graphing sound waves

Answer 9

1) Create graph with respect to time
2) Start at x=hShift. If sine, y=vShift. If cosine, y=amplitude+vShift
3) Calculate period from the frequency. Mark the above y-value at every frequency multiple on x
4) If sine, mark that y-value between the frequency multiples too. If cosine, mark those frequency midpoints with yValue-(2*amplitude)
5) If sine, mark the first frequency quarter point with (amplitude+vShift), alternating between positive and negative for each half-frequency measure thereafter. If cosine, mark the frequency quarter points with the y-value in the middle of the y-values on either side.
6) Connect all of the points with a smooth curve

Question 10

Functions for sound waves

Answer 10

Always trig-functions

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