Do anyone know if the backup sensor audio can be adjust? I can not hear the beeps when the radio is on. Even when the radio is off, I can bearly hear the beeps. The SA told me the sound is fixed and can not be adjusted. Is it true?

 

I've driven an MDX and an RL with the backup sensors and both were excessively loud, definitely audible over all but the loudest music. I don't know if they're adjustable or how, but maybe they can install it differently to make it louder?