After watching the video, I learned that sound travels in waves. Sound can be measured in  decibels and hertz. I learned in the video that if there is a bad word in a song you can reverse it and it cuts the bad word out.

After watching the Today video I learned a lot. One of the things I learned is that once you loose your hearing there is nothing you can do to get it back its gone forever. The video was about a guy who had started to loose his hearing and he had to get permanent hearing aids. It showed the challenges of hearing loss and how to prevent it. After watching this video I know that I need to turn down my volume because loosing your hearing could ruin your life.