*The one I have in my textbook is this:*

[![IR of ethyl amine from the textbook](https://i.stack.imgur.com/RNJpS.png)](https://i.stack.imgur.com/RNJpS.png)

> 
> Shouldn't the first trough at $3500$ to around $3000$ mean that it's an $\ce{O—H}$ group with a $\ce{C—H}$? And then the other trough at $1700$ be a $\ce{C=O}$? Why is this ethylamine $\ce{CH3CH2NH2}$?
> 
> 
> 

*The other one I found on Google:*

[![IR of ethyl amine from Google](https://i.stack.imgur.com/kYPg5.png)](https://i.stack.imgur.com/kYPg5.png)

> 
> Shouldn't the $\ce{NH2}$ group have double troughs? The only trough there is the $\ce{C—H}$ at $3000$. How is this ethylamine?
> 
> 
> 

Can anyone explain those spectra for me? Are both correct? I'm very confused.