Fourier analysis of a particular spectrum includes the harmonic frequencies 1113 hz , 1431 hz , and 1590 hz . part a what is the fundamental frequency f1, assuming that f1 > 100 hz?

The fundamental frequency is 159 Hz.

Explanation:

Given that,

First frequency = 1113 Hz

Second frequency = 1431 Hz

Third frequency = 1590 Hz

Here, three frequencies are separated from each other by the multiple of 159

We need to calculate the fundamental frequency

As,

1113 Hz is the seventh harmonic of 159.

Hence, The fundamental frequency is 159 Hz.

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.