40 Amazing Facts about Sound | Amazing Facts 4U
- The sound comes from vibrations. These vibrations create sound waves that move through mediums such as air and water before reaching our ears.
- Our ears vibrate in a similar way to the original source of the vibration, allowing us to hear many different sounds. Actually sound enters the brain as a jumbled mess. Amazingly the brain has the capacity to organize the sound into something as amazing as human speech or music.
- We hear sounds that vibrate between 20 and 20,000 times in a second. Bats hear sounds that vibrate up to 200,000 times a second. Sounds with a higher frequency than humans can hear are called ultrasound.
- The scientific study of sound waves is known as acoustics.
- The amazing fact is that if you try to say the alphabet without moving your lips or tongue every letter will sound the same.
- Sound in fact can’t travel through a vacuum. There is no sound in space because there is no object for sound to travel through.
- Sound is used by many animals to detect danger, warning them of possible attacks before they happen.
- Dogs, cats, dolphins, and mice can hear ultrasounds. Certain crickets, moths, and frogs make and hear ultrasounds, too.
- Bats use a special sense, called echolocation. They listen to echoes of their ultrasonic calls to find food and avoid obstacles.
- We measure the loudness of sound on a scale called decibels. Loud Sounds that are greater than 85 decibels can damage your hearing. Ordinary conversation is held at 60 decibels. Aircraft taking off has sound in the range of 80 to 90 decibels. The rustle of leaves is about 10 decibel. The quiet automobile is about 50 decibel.
- Amphitheaters, both ancient and modern, have a curved shape to create an area that echoes or amplifies sound.
- The speed of sound is around 767 miles per hour (1,230 kilometers per hour). That means light can reach the moon in 1.2 seconds, while it would take sound 12.9 days.
- The loud noise you create by cracking a whip occurs because the tip is moving so fast it breaks the speed of sound!
- Wind doesn’t make a sound unless it hits something in its path.
- The Long Range Acoustic Device, categorized as a sonic weapon, is capable of firing a “beam” of sound hundreds of meters. If you are close to the weapon when it fires, you can lose your hearing and/or be physically hurt by the sound waves. These have been used in crowd control and riot breakups.
- Sound has “shadow zones,” which are based on temperature. In these “shadow zones,” you cannot hear any sound. This is because sound waves change direction and bend upward based on temperature changes. So basically, sound travels above cold temperatures. Submarines use this to their advantage when they want to hide from sonar.
- Sound can travel through materials.
- When traveling through water, sound moves around four times faster than when it travels through the air.
- Sound travels 15 times faster through steel than air.
- sound travels 10 times faster through granite than air.
- If the vibrational waves of a medium changes, the sound it produces will also change.
- Although music can be hard to define, it is often described as a pleasing or meaningful arrangement of sounds.
- The sound of thunder is produced by rapidly heated air surrounding lightning which expands faster than the speed of sound.
- Sound produces a relatively low level of energy when compared to other forms of energy. Because sound produces such a low level of energy it is not used for electricity.
- If a human being yells for 8 years, 7 months, and 6 days straight, he/she would produce enough sound energy to heat up just one cup of coffee. Energy is so low.
- Hard materials can reflect sound so that the sound travels back in the opposite direction. This is called an echo.
- Whales in the ocean “sing” to each other. The sound of their song can travel a distance of 800km. these sounds are emitted at specific frequencies receivable by other whales.
- At 115 dB, a baby’s cry is louder than a car horn.
- The loudest natural sounds ever made on our planet Earth are probably gigantic volcanic eruptions, such as the explosions of the island of Krakatoa.
- All different frequencies that the human ear can hear played at once, form the sound…. OOOMMMMMMMMMM. This sound is referred to as the “sound of creation”.
- 2 different sound frequencies played at once through headphones, each in a different ear causes the brain wave frequency to align with the difference between the two. For example, a continual 400mhz frequency in your right ear and 410mhz in your left ear will cause the brain wave frequency to align to 10mhz. This brain wave frequency is referred to as “Gamma frequency” and is common only in deep sleep or deep meditation. This form of brain wave stimulation through sound is called binaural beats.
- The hammer, anvil, and stirrup are the three smallest bones in our bodies in our ears responsible for sound transmission. Together they are about the size of a pea!
- Our ears pick up sound while we sleep, but our brain does not “hear” it!
- In Africa, a tribe of people called Maabans lives in such quiet that they can hear a whisper from across a baseball field.
- Aging causes gradual hearing loss, mostly in the high frequencies.
- Speech reception is not seriously impaired until there is about 30 dB loss but by that time severe hearing damage may have occurred.
- The incidence of hearing loss in classical musicians has been estimated at 4 to 43%, in rock musicians it is 13 to 30%.
- Flies cannot hear at all.
- Elephants communicate in sound waves below the frequency that humans can hear.
- Lions can’t roar until the age of 2.
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