Is there a way to silence loud audio streaming?

There are times when the person I’m calling is quiet or a YouTube video is quiet and I turn the volume up when streaming from my iPhone to the Reals, but sometimes the iPhone’s robotic voice talks when a call isn’t returned (and I forget to adjust the volume down from a previous call) and it’s way too loud, or an Ad shows up on YouTube and the volume hurts my ears. Is there a way to silence these without affecting the volume of the person, or the video? Can this cause hearing damage?