**Questions:**

**300. Shorter string**

**310. Frequency spectrum for shorter string**

**320. Continuous spectrum**

**330. What spectrum?**

**300**.
A string of length *L* that is tied at both ends has allowed frequencies
equal to 10 Hz, 20 Hz, 30 Hz, etc. What would be the fundamental frequency
for an identical string that has length L/2?

Check your answer HERE.

*Fundamentals of Sound*
reference:Secs. 2-C, 7-F.

**310**.
A complex standing wave on a string tied at both ends, and its corresponding
frequency spectrum, are shown below.

Which frequency spectrum
would correspond to the complex wave shown below. (Both strings are at the same
tension and have the same mass density: i.e.,* *velocity* v* is the
same in both).

*Fundamentals of Sound*
reference:Sec. 7-F.

**320**.
Consider the following traveling pressure sound waves in air:

To construct the waves above by Fourier's Theorem (i.e., by adding together sinusoidal waves), which would require a continuous frequency spectrum?

a)
A) and D)

b) A, C), and D)

c) B)

d) B) and C)

e) All of them

*Fundamentals of Sound*
reference:Sec. 7-F.

**330**.
Which frequency spectrum would most likely correspond to the following sound
pressure traveling wave?

*Fundamentals of Sound*
reference:Sec. 7-F.

© William J. Mullin