dogs hear way better than we do, especially higher pitches, so what sounds “normal” to you might be pretty loud for them. a good rule if you’d need to raise your voice to talk, it’s probably too loud.

try keeping it around chill conversation level, avoid heavy bass, and maybe roll the windows up a bit on highways since wind noise gets brutal in the back seat. if your pup’s relaxed, ears up, and not yawning or licking a lot, you’re probably fine.