i learned today that sound is measured in frequency. sound travels in waves. the video we watched was about a guy who has some hearing loss because he wore headphones. He went to a lady who helped him get his wearing back by wearing these hearing aid things that weren't as big as the ones old people wear.
i have head phones in a lot so i might have to start just listening to music out loud. thus video did make me think about how much i have head phones in my ear and am listening to loud music.