Chapter 1 RQ 3,6,7,10,12,16 E 4,5,9,11
Chapter 2 RQ 2,4,5,6,7 Q 1,4 E 1,2,4
Chapter 3 RQ 1,3,4,5,12,13,14,15 Q 4 E2,3,4,5,6,7
Chapter 4 RQ 4,8 Q 4 E 3,5,6
Chapter 5 RQ 1,2,3,9,10 Ex. 1,2,3,6
Chapter 6 RQ 5,10 Q Ex. 1,2,3,5
y2(x) = 1+10^-x
y3(x) = 2+10^-x
y4(x) = 1+sin(pi x) +10^-x
For the log scale, ticks at
powers of ten will suffice, i.e. don't
subdividing the decades.
Problem C: Use your calculator
to determine log 850 and log 1150.
Check your results against log 1000.
Problem E: You are listening to your favored music at the threshold of pain
(110 phons) at 50 Hz as well as at 1 kHz and at 6 kHz. When neighbours
complain, you reduce the sound intensity level by a factor of million
(independent of frequency). Determine the resulting loudness (sones)
at the three frequencies, and compare with the original.
Problem F: Two incoherent sources (e.g. violinists) emit sound of same power,
at frequencies f1 and f2, respectively. What can you say about the
resulting sound as compared to the two separate sounds, if
a) f1 = 1000 Hz f2 = 1000 Hz
b) f1 = 1000 Hz f2 = 1500 Hz
c) f1 = 150 Hz f2 = 3500 Hz
Problem G: If one violin produces SIL of 75 dB
a) what will you get from two violins (playing unison)
b) how much from 10 violins?
c) how many violins do you need to get to 95 dB?
Plus: the problems labeled HW in the Math and Physics handout