A person whirls a sound tube with a period of 3 rotations per second and a radius of 0.75m. If they hear a pitch of 880 Hz (A on a piano) 

a. what are the approach and departure speeds of the tube end?

b. what range of frequencies does the class hear?

Answer rating: 100% (QA)

To answer these questions we need to consider the Doppler effect which describes the change in frequency of sound waves due to the relative motion bet... View the full answer