Hi. I have a Subaru Outback. It's the seventh Subaru, starting from Leone and thru Forester to Outback. It's noise level indoors is quite low, so that's one reason I'm so fond of Subarus.
My statement, that people listen mostly vocals is based on is empirical: what I have had comments. In the genres I produce music, people are often interested in stories the song is telling, so it's important to hear the vocals.