Today (25.8.14) we went to the Whare Kai for a talk about Dangerous Decibels. The lady that who was going to talk to us was called Toni. She talked to us about how sounds are actually vibrations and that that safe decibels sound is 85 so a washing machine, food mixer, piano practice and rain are all safe to hear at 50 - 80 decibels, but a heavy metal concert, firecrackers, and a bass Drum at 1 metre are dangerous and are ranging from 130 - 150 decibels.
We did a test with tuning fork and a ping pong ball. first we hit it on the floor and then bought it up to our ear. Then we hit it on the ground again and placed the tuning fork against our hand lightly. After that we hit it on the ground and placed it against the pingpong ball. The reaction was the pingpong ball bounced and then came back and bounced again. This showed the vibrations of your ear when the decibels were safe. But then we hit it on the ground 5 times and put the tuning fork against it and the pingpong ball went crazy bouncing higher and higher each time it hit the ball. This showed the vibrations of your ear when the decibels are dangerous.
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