How bad is it for a 3-month old to listen to 90db radio noise for 5 mins? The other day my bluetooth connected car stereo switched to FM radio and turned itself on after I walked out of my car with my phone (even though the stereo was off). The rest of my family stayed inside the car with my 3-month newborn while I was running to the convenience store next block to get something. The radio was kept on until I got back, which lasted for around 5 mins because none of them knew how to turn down the volume or switch it off. Even though the reports I found online shows that normal adults can tolerate 90db sound for a few hours before getting hearing damage, I'm really worried as newborns are more sensitive to sound so I'm not sure how much damage those 5 mins could have done? Any professional advice would help. He didn't cry or show discomfort during those 5 mins. It's hard to tell as I'm not sure if he's now reacting to my sound or movements. Thanks