Sound questions (frequency, harmonics, etc)?

Question

1. A violin string is oscillating at a frequency of 880 Hz (1 Hz = 1 full cycle / second) in its 2nd harmonic. What wold be the frequency of the fundamental vibrational mode?

2. Describe how you would go about finding the frequency of an unmarked tuning fork using the resonance column apparatus and a known tuning fork.

Answer 1

1)

293.3 Hz = f1....fundamental mode



880 Hz =f3---2nd harmonic

In general fn =n x f1

Since f3 = 880 =3 x f1

f1 = 880/3 = 293.3 Hz

2)  what is the resonance column apparatus?

You could use beat frequency

strke both tuning forks and count the beats

beat frequency = absolute value ( f1 - f2 )

Answer 2

1.

second harmonic is 880 Hz, and fundamental (same as first harmonic) is 440 Hz

2. no idea.