I also have this. Intensity of the noise correlates to the brightness of the flash. Also, it isn't every noise for me. "Sharp" noises, like a door closing or my

I also have this. Intensity of the noise correlates to the brightness of the flash. Also, it isn't every noise for me. "Sharp" noises, like a door closing or my cat knocking a book off a table, etc make the flash. The heater hummin. Along in the background does nothing.