I don’t know if that is volume based though as I do exactly the same and even when the volume is down low it is like my brain is tuned into listen on that level and so I miss the first sentence of what is said from an outside source. At least I can hear they are there however!
They really are great for so many applications. I used to do Acid a lot more than I do these days and they were fucking great for a trip and out walking in the woods. I could have them on a good volume to soundtrack my walk but whilst also being able to hear nature around me. Just perfect for trippy walks.