Dangerous decibels

Today we had a session on dangerous decibels. We learnt how noises can affect our ears. 1 fact I found out was that frogs can grow the hairs in their ears back. I learnt that if you go right next to fireworks when they go off you can go deaf. One thing I will change is to have my ipod down when I listen to music. We also used these metal things to find out how vibrations create energy.