Neighboring rights are separate from music publishing rights. They represent ownership of a recording and those who were the performers/instrumentalists on a recording.
The revenue is generated from :
-Pandora (or any internet radio platform)
-BBC Radio, Sirius XM (or any satellite radio platform)
-Cable TV music channels
-Terrestrial radio (outside of the USA) **
-Businesses and retailers as background music (ex. restaurants, hotels, etc..)
-Live Clubs and/or any performance venue
-Various new online media
You can learn about who collects them here.
You can learn more about figuring out if you are earning them here.
Songtrust does not currently collect neighboring rights royalties.