I almost hate to ask this, but there are some very knowledgeable people on this site so here goes. I have been noticing a "ringing" when I play my trumpets that I hadn't noticed before. Like the aftertones on church bells. You know how you can hear all of the other tones in a church bell besides the primary note struck. I am wondering if this is in the bell of the trumpet. I notice it more on the Strad than the Conn 22. It is subtle enough I have no idea if it can be heard on the other side of the trumpet or not, but I am finding it somewhat distracting lately...don't know how I never noticed it before. Now that I have noticed it I seem to hear it more. . Sometimes the subtle ring is a high pitch, or a high and a middle besides the note I am playing whenever it happens I can feel the vibration in my left hand. Makes me think a resonant wave has set up. Not saying that is what is happening just that is what the impression is like. Doesn't matter if I am playing loud or soft, high or low. The purer my tone is, the more this seems to happen. Problem is just like a church bell the "ringing" i hear is just an aftertone, sometimes harmonic and sometimes dissonant to the note being played. Again it is subtle enough no one else may hear it, and I don't have anyone around me with trained ears to listen for it either. Can anyone enlighten me?