Physics of Musical Sound , 33-114 Homework #6, Spring, 2014
SOLUTIONS
Problem 1) The trick here is often expressed as In music, 6+5=10. The point is that terms like
fth count both the starting and end
Physics of Musical Sounds, 33-114 Homework #7, Spring, 2014
SOLUTIONS
Problem 1) If we pick any number of harmonics from a series nf1 , then the period of the sum is
1/f1 . The period of the nth harmo
Physics of Musical Sound, 33-114 Homework #5, Spring, 2014
SOLUTIONS
In the case of calculations, round-o errors of 1 cent are acceptable. But you should have exact
values in 12-tet (simply multiples
Physics of Musical Sound, 33-114 Homework #1, Spring, 2014
SOLUTIONS
Problem 1) Hall 1-6
Reasonable chest area estimates might range from (0.1 - 0.3) m2 . Lets use S = 0.2 m2 .
(Careful: 0.1 m2 = 1000
Physics of Musical Sound, 33-114 Homework #4, Spring, 2014
SOLUTIONS
Problem 1) Modied Hall problem
a) The amplitude will vary as the square-root of the intensity.
There are really two steps to this;
Spring Forces Class Exercises
Physics
1. The staples in a stapler are pulled into position by a spring with a spring constant of 50 N/m. When
the stapler is open, the spring is 8 cm long and relaxed.
Physics of Musical Sound, 33-114 Homework #1, Spring, 2017
SOLUTIONS
Problem 1) Hall 1-3
v(30 C) = 344 m/s + 0.6 m/s C(30 20) C= 350 m/s.
t = d/v =(350 m)/(350 m/s) = 0.1 s.
Problem 2) Hall 1-6
Reason
Physics of Musical Sound, 33-114 Homework #2
Due MONDAY, February 06, 2017 (in class)
Problems 1 - 5) Hall - Chapter 4, Problems 4, 7, 9, 11, 13
Problem 6) Hall - Chapter 4, Problem 8 (exam-type)
Inst
Physics of Musical Sound, 33-114 Homework #1
Due Friday, January 27, 2017 (in class!)
Note that partial answers for many problems are in the back of the textbook. You are expected to
also provide reas
Physics of Musical Sounds, 33-114 Homework #11, Spring, 2014
SOLUTIONS
Problem 1) Hall 13-8
A clarinet has notes (with all holes closed) of f, 3f, 5f, . The same pattern applies to any other
ngering a
Physics of Musical Sounds, 33-114 Homework #9, Spring, 2014
SOLUTIONS
Problems 1) and 2) are good examples of being careful to distinguish variables with subscripts, so
we avoid confusion. You are of
Physics of Musical Sounds, 33-114 Homework #10, Spring, 2014
SOLUTIONS
Problem 1) Chapter 11, Problem 15.
The key point is that air is very light and easily displaced as the heavier glass vibrates. Li
Physics of Musical Sounds, 33-114 Homework #8, Spring, 2014
SOLUTIONS
Problem 1) Hall 9-18
The top pair has a node only at the outer edge, and an anti-node in the center; it is (0 1). The next
pair ha
EXAM II 33114 Physics of Musical Sound March 25, 2014
NAME (print): ________________________________ W
Signature: _~____________-'"mm___ __ ___ ___ __:T:'f":_____7_7_:f':::::::::i::f'f:: ., .. .
Physics of Musical Sound, 33-114 Homework #3, Spring, 2014
SOLUTIONS
Problem 1) Hall, Ch. 5, Problem 3
The total power P = IS = (106 )(7 105 ) = 7 1011 W.
E = P t, so in 10 seconds, we would have 7 10
Physics of Musical Sound, 33-114 Homework #2, Spring, 2014
SOLUTIONS
Problem 1) Hall 4-7
= v/f = (344 m/s)/(688 Hz) = 0.5 m.
Constructive: |L1 L2 | = n for integral n,
so |L1 L2 | = 0.0, 0.5, 1.0, 1.