Natural Frequencies and Harmonics

[ThatDude]

Homework Statement

Basically, I was reading the following passage from a textbook, and I'm confused as to why they mention natural frequencies? Doesn't each harmonic have just one frequency that it oscillates at? From what I understand, the natural frequency is just the frequency an object likes to vibrate at. Can someone please make this clear?

 

[NascentOxygen]

A taut length of string can vibrate at a particular natural frequency, and potentially also at integer multiples of that frequency. These multiples are known as harmonics.

 

[orsanyuksek2013]

As you say, the harmonic wave has just one wavelength and one frequency.

The above given expression describes how many possible wavelenth (and therefore frequency) values a harmonics wave can have given for a complete 2 pi displacement.

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Örsan Yüksek