The units

of sound intensity in SI units are:

What

happens when a sound wave propagates from a medium with low acoustic impedance to

a medium with high acoustic impedance? And vice versa? And when the two media

have similar acoustic impedance?

Resonance

occurs when

Two identical columns, open at both ends, are in separate rooms. In room A, the temperature is T=20°C and in room B, the temperature is T=25°C. A speaker is attached to the end of each tube, causing the tubes to resonate at their fundamental frequency. Is the frequency the same for both tubes? Which has the higher frequency?

In a

resonant tube open at one end and closed at the other the resonant frequencies

are determined by all the following except

A) the tube

diameter.

B) the

length of the tube.

C) the

temperature of the air.

D) the

speed of sound.

Why?

Wine glasses can be set into resonance by moistening your finger and rubbing it around the rim of the glass. Why?

You are given two instruments of identical length. One is closed at both ends, whereas the other is closed at one end and open at the other end. Assuming the speed of sound is the same in both tubes, which is able to produce the lowest frequency?

Consider a wave produced on a stretched spring by holding one end and shaking it up and down. Does the wavelength depend on the distance you move your hand up and down?