Annoying sounds from cars at stop light


What causes the stereo in the car next to you at the stop light so loud and annoying with over the top bass and how can the driver stand it?

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I was once at a stop light and the car in front of me was producing such thumping one note bass the bandana he had hanging from the rear view mirror was fluttering.  Couldn't stop laughing for about 15 mins
...I've assumed at times that the driver (and any passengers) are engaged in some form of G.I. tract 'purge'....

Pity such young people are suffering from these maladies....must be some sort of 'urban plague' that's so embarrassing that they resort to such high db levels to mask their pain....
...one Could retaliate ('scuse me...Assist...) by playing Schubert EXTREMELY LOUD....
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bdp24, after years of standing in front of loud guitar amps I found that the greatest sound pressure was found right behind the horn section (for my orchestration class) during school orchestra rehearsals.  Most disconcerting.  And it reminds me of an old joke about water buffaloes and conductors...