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The speed of sound
Sound must travel through a medium like water, air or even sand. It means you will never hear an explosion in a vacuum.
The speed of sound, or the sound's velocity, differs depending on how dense the medium is it's moving through. Generally, the speed of sound is 1,127 feet per second or 767.54 miles per hour.
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Benefiting from understanding sound
Musicians and content creators need knowledge of frequencies and amplitude in their home recording set-ups to ensure their voice sounds rich and clear. Understanding sound can help them choose microphones best suited and help to set up the room to reflect or dampen sounds.
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Sound frequency
The shape of waves is rolling peaks and valleys. If the wave moves faster, the peaks and valleys form closer together. If it moves slower, the waves spread out.
- The speed of a sound wave - how fast the waves move from peak to trough - is called frequency
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Sound waves are a type of power
We are surrounded by sound waves. Sound has the power to communicate ideas, scare us, entertain us, even help us fall in love.
Sound waves are a kind of energy that is launched when an object vibrates. These waves travel through a medium like air or water. When they reach y...
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Other useful sound terms
- Amplitude (amps) describes the height of the sound waves and gets measured in decibels (dB).
- Timbre is the perceived sound quality. You can distinguish the unique harmonics of timbre by the combination of notes in a chord.
- Envelopes
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The earth spins faster than the speed of sound
The Earth spins at the speed of 1,036 miles per hour (1,667 kilometres per hour).
- The tides can slow the Earth's rotation speed and add about 2.3 milliseconds to our day every century.
- Weather systems can also change the Earth's rotation.
The Impact With An Asteroid
- When a high-impact asteroid or smaller rocks known as meteors rush towards Earth, the atmosphere behaves like it is water being hit by pebbles.
- The rocks burn away in the friction when colliding with the atmosphere, with the giant asteroids (those the size of a mountain) having the...
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