# Homework Help: Determining fundemental frequency from experiment

1. Apr 14, 2013

### susdu

1. The problem statement, all variables and given/known data

An experiment was conducted with a string. the following successive harmonics were measured:
46.9Hz, 53.7Hz, 61.9Hz, 70.9Hz

a. Evaluate the fundemental frequency
b. which harmonic corresponds to the 61.9Hz frequency?

2. Relevant equations

3. The attempt at a solution

Well, on average the gaps between the harmonics are 8Hz, so it looks like they are all multiplies of 8Hz (on average). But I don't know if its a string with two fixed points or not, because the fundemental is different in each case.

2. Apr 14, 2013

### Staff: Mentor

Why should it be different?
8 Hz is the lowest resonance frequency of the string.

3. Apr 14, 2013

### susdu

You're right, but wouldn't that change the harmonic 61.9Hz belong to?

Last edited: Apr 14, 2013
4. Apr 14, 2013

### Staff: Mentor

I don't understand that question.

5. Apr 14, 2013

### susdu

61.9Hz is nth harmonic (first,second,third etc)

6. Apr 14, 2013

### Staff: Mentor

If 8 Hz is the fundamental frequency, what is the frequency of the first harmonic? What is the frequency of the second harmonic? ...

7. Apr 14, 2013

### susdu

Sometimes I tend to over complicate things, thank you.