car makes a whining sound on 2005 Acura TL

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when driving in reverse car makes a whining sound
(1) Answer
It's hard to guess at the cause of a noise without being able to experience the noise first hand, my guess is the brake pads have a "squealer" built into them to alert the driver the pads are worn.