How to hear myself in headset?

[Odd Rain]

I bought a headset so I can make calls on my oneplus 5T hands free.
It works but I don't hear my own voice in the headphone and I would like to.

Is there a way to do this that is generic to all android phones?

 

[svim]

Try this 'HeardThat' app:
https://play.google.com/store/apps/details?id=com.singsoftnext.deephearing&hl=en_US&gl=US
It has a neat filtering option using a sliding control so you can allow-to-block background noises and make voices stand out better.