sound Flashcards
1
Q
atenuation
A
Atenuation = atenuation constant * length (cm) * frequency (MHz)
2
Q
what afffects the speed of sound in a medium?
A
the elasticity (will travel faster in a stiffer medium) dentsity (will travel faster in a less dense medium)
3
Q
intensity of sound
A
power (watts)/area (meters^2)
4
Q
Baseline intensity
A
10^-12
5
Q
speed of a wave
A
v= wavelength * frequency
6
Q
shorcut to calculate positive exponent
A
log(n * 10^e) = e.n
7
Q
determining the harmonics of a standing wave
A
at least one end open = count nodes
both ends fixed = count antinodes
8
Q
doppler effect
A
F` = fi(vc+/-vd)/(vc+/-vs) vc = speed of sound
9
Q
speed of sound at STP
A
330 m/s
10
Q
decibel
A
L = 10 * log(I`/baseline I)
