Clicking sound coming from engine, not heard outside the car. Poor dampening?

What is your question?

This sound is heard within the cab. It is a slight ticking sound identical to fuel injectors and lifters. It is not heard outside the car; it is only heard inside the car with all the windows up. It does increase in noise with RPM, but does get drowned out if I put my foot on the gas hard enough. I just don't want my car to sound like a sewing machine from inside the cab when I drive. Is this a normal Subaru sound and can I just change the injectors to make it more quiet? Or is it something else entirely.....help!

What makes this problem better or worse?

Nothing

How long has your 2015 Subaru XV Crosstrek had this problem?

Since I bought the vehicle