I have a pretty good stereo system at the house, and I like to listen to my music and movies at a loud volume, but one not particularly dangerous for humans: typically 80-90dB, possibly with peaks around 95-105dB for gunshots/explosions in movies. I'm well versed in OSHA's hearing duration recommendations, and as someone suffering from some high-frequency hearing loss due to loud concerts 20 years ago, I make very sure not to do further damage to myself.
I have a dog who loves to lay near my feet while I'm listening to music, or watching movies. My wife is concerned that "the music is too loud for the dog!" and constantly asking me to turn it down.
Obviously dogs have more sensitive hearing than humans, but from my understanding of how sound and hearing works, all that means is that they've got a greater High Freq. range and can hear softer sounds than humans can. It doesn't seem to mean that sounds feel/are twice as loud for dogs than humans. Unfortunately trying to find information about this online seems to conclude that this is the general consensus... but of course no one has any proof, just repeating the rote "dogs hearing is more sensitive" line with no explanation of why that would be bad. To me that's argument makes as much sense as saying that dogs/cats have more sensitive eyesight so we ought to dim the lights so we don't hurt their eyes... which obviously isn't the case.
My dog doesn't seem to mind and happily goes to sleep right beside me during a movie at loud volume, while still going crazy when he hears a neighbor talking in their yard across the street (i.e. his hearing is fine). I'm of the opinion that if it was actually causing damage to him, he'd move to a different room.
Have there been any actual studies on this? Is loud music more dangerous for a dog than a human? Could the fatigue contribute to future deafness in my dog? Should I turn the volume down or is everything fine?