1. Learning Objective 7
Beats Clicker Question:
What do we hear when something is referred to as a beat?
A. Two waves which have slightly different frequencies, where the amplitude increases and
decreases as a function of time.
B. Two waves which have largely different frequencies, where the amplitude increases and
decreases as a function of time.
C. Four waves which have slightly different frequencies, where the amplitude increases and
decreases as a function of time.
D. Four waves which have largely different frequencies, where the amplitude increases and
decreases as a function of time.
E. One wave which have slightly different frequencies, where the amplitude increases and
decreases as a function of time.
Correct Answer: A Two waves which have slightly different frequencies, where the amplitude
increases and decreases as a function of time. This is correct because when hearing a beat it will
have two different frequencies than three, four, or one.