Evolution of MIcrophones
Why is this invention is helpful?
Why is this invention important?
This is important because if there was like a shooting in your school you would have to inform the school and tell them where the predator is so you could get out quicker. This might change your life because it could help you in very dangerous situation and when you want people ti hear what you have to say or if you are at a concert and you want your fans to hear.