Are you fond of listening to music from a mp3 player? Do you always listen to music at the same level? Probably not; why? There is a lot of noise surrounding us. Cars, motorbikes, advertisements... every time is more and more difficult to hear to sounds we want to listen. I mean, our voices, conversations... This is what we know as noise pollution. And it is harmful to living beings. Humans can develop cardiovascular diseases due to noise pollution; in animals, reproduction or navigation can be altered. All of them will have hearing loss.
I propose you a simple experiment. You are going to listen to music in different situations. At night, when everything is silent; in a noisy environment (street with lot of cars and motorbikes, shopping malls...) and in an intermediate situation. Adapt the volume to the minimun you can hear and write down the number you read on the screen of your device. We will calculate in the classroom the average values.
What are your conclusions of our experiments? Write them as comments. Try to do in English. I will pay special atention to your solutions for noise pollution!