“Sound waves do not die out. They travel forever and forever. All our sentences are immortal. Our useless bleating circle the universe for all eternity.” – Fay Weldo
1. The world’s loudest sound
The World’s Loudest Sound was made by the Krakatoa volcanic eruption in 1883. According to experts, the sound was so loud that it reportedly traveled around the world four times and damaged eardrums of people 40 miles away.
2. What does music do to the brain?
“If you want to keep your brain engaged throughout the aging process, listening to or playing music is a great tool. It provides a total brain workout.” According to researchers, listening to music can lessen anxiety, blood pressure, and pain. People listening to music tend to have better sleep and mood. Music can also improve mental alertness, and memory.
3. Sound & Echo
In order to hear an echo, there should be a minimum distance of 17m between the source of sound and the reflecting body. The loudness of sound should be adequate in order to be heard after its reflection. The reflector should have a significantly large area for enough reflection of sound.
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4. Speed of sound
Sound travels faster in water than through air. The speed of sound in water is 4.3 times faster than by air. However, sound travels much faster through steel than both air and water.
5. Sound and Space
There is no sound in space. This is because there are no molecules there, thus sound cannot travel through space. On Earth, we have air molecules that vibrate to our ears.
6. What causes thunder?
Thunder is caused by the rapid expansion of air that surrounds lighting. When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel. Once the light is gone the air collapses back in and creates a sound wave that we hear as thunder. If you hear the sound of thunder, then you are in danger of lightning!
7. Listening to music enhances physical performance
According to researchers the synchronization of music with repetitive exercise provides enhanced physical performance. People who work out while listening to music tend to train more efficiently and for a longer time.
8. Music & heartbeat
music affects the heartbeat. Researchers at Pavia University in Italy explained that music with quicker tempos had people breathing faster, with increased heart rate and blood pressure, while slower tempos produced opposite effects.
9. Imprinting Sound
Sound is currently being used to help historical research. Thanks to archaeoacoustics, every site has a specific sound or echo unique to itself.
10. Fly & Sound
Flies cannot hear any kind of sound. Not even their own buzzing.