Children are often amazed by the fact that sound is only perceived and not observed. Sound wave information for kids can be an ideal way to get them aware of how sound waves travel and why they are hearable. If your child is interested in science and interested in learning more about sound wave phenomena, you’re at the right spot.
Give your budding physicist all the necessary information to allow them to study the subject in depth. This is why we’ve collected a list of entertaining, informative, fascinating, and interesting information regarding sound waves. Find out more and test your little scientist at home.
Facts about Sound Waves
Here’s a long list of Facts about Sound Waves that you need to know.
1. What is a Sound Wave?
A sound wave is a mechanical wave requiring a medium or object, like air or water, to pass through. In reality, the definition of sound is an energy form caused by the vibrating of matter molecules, and it is heard when sound waves travel through the medium that is closest to your ears.
- As with the other wave types, sounds contain amplitude, velocity, frequency and speed.
- If an object puts the force of another object, the sound is created. For example, when you strike the drum, it oscillates and makes motions in the molecules of air, resulting in the generation of a sound wave.
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2. How do Sound Waves travel?
The energy contained in the sound wave is pushed outwards from its source via a series of pulses of air molecules to air molecules. When the sequence of sound waves is squashed, they are referred to as compressions, and when they extend out, it is known as rarefaction. Sound waves travel through rarefactions and compressions within the air.
3. What is the best way to measure The Sound?
- Noise is measured in decibels or pascals rather than measuring as Joules which is the conventional energy measurement unit.
- You measure the resonance of the soundwave measured in Hertz, i.e. vibrations per second.
- A person’s perception with normal hearing ability helps to determine the amount of sound energy.
- The measurement of sound’s frequency is connected to its pressure. Sound waves are also known as pressure waves because they are able to move particles in the medium they travel.
4. How do different types of sounds occur?
Different types of sounds are produced due to the fact that sound waves have various frequencies. Frequency refers to the total number of sound waves or vibrations occurring in a single second. In some instances, you define frequency in terms of pitch:
- It is possible to detect high-pitched sounds as well as low-pitched sounds.
- High-pitched sounds occur because sound waves have a high frequency. For example, the whistling sound.
- Low-pitched sounds are because of sound waves that have a low frequency. Like, for instance, the bass drums.
- Additionally, the faster the vibrations and the louder the sound, slow the ones create a mild sound.
5. What Are Different Types Of Sound Waves? And Which Sound Waves Can We Hear?
- The Audible Sound Waves
Audio sound waves are characterized by frequencies ranging from 20 Hz to 20 kHz. These sound waves are easily heard. Humans can detect sound waves that range between 1000 Hz and 6000Hz, the most effective.
2. Ultrasound Waves:
Sound waves with more than 20kHz are referred to as ultrasound waves. However, it is impossible to hear this kind of sound. Animals, like bats and dolphins, use ultrasound waves to identify their prey and communicate with them.
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3. Infrasound Waves:
Sound waves with an amplitude lower than 20Hz, are termed infrasounds, and you can’t hear them.
6. Why Sound Waves Aren’t suitable for generating electricity?
Sound waves are known to produce significantly lower energy levels than other types of energy. Since all sounds produce very little energy, it is not recommended to use them for the production of electricity because it needs a lot of energy.
7. Do Sound Wave Create A Shock Wave?
Yes, sound can create the sensation of a shock wave. The repetition of sharp and loud sounds, such as when you’re making a drum or when an object is vibrating at high speed, can cause shock waves. A sudden clap or bang causes a shock wave. While a shock caused by a clap is not harmful, a shock wave that results from an explosion is hazardous as it could kill a lot of individuals.
8. How Do Sound Waves travel?
- Sounds travel with a rate of 767 miles an hour, i.e. 1230 km/h.
- Sound waves move through solid matter like stone, iron, and steel, but they must travel accelerate faster than the speed at which they travel through the air.
- Additionally, noise can travel through liquid media like water four times faster than when it moves through the air.
9. Why Can Astronauts Not Hear or communicate in Space?
Sound waves are able to travel through gases, solids, and liquids. However, they are not able to travel through a vacuum. Space isn’t a way for sound waves to traverse, and it’s also packed with air. Thus, astronauts can’t speak or hear each other in Space. They need a radio to communicate and listen.
10. What is resonance?
A glass of wine is vibrating at a normal rate. The opera singer could smash a glass using an extremely high note. The note must have a frequency similar to the vibration of glass because both the frequencies for the note and the glass are the same. Energy transfers to the glass, which then vibrates in such a way that it gets destroyed. This phenomenon is known as resonance. The technique can be used to enhance the sound of certain types of musical instruments.
11. What is a deafening sound?
The sound jet planes make when it takes off can be a million times louder than the sounds you hear regularly. The loud sounds can be described as deafening noises that cause ear pain and can cause damage to your ears.
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12. What is a Doppler Effect?
The variation in the wavelength and frequency of a sound because of the difference in distance from the point of origin to the person who receives the sound is known as the Doppler Effect.
- When the sound source is moved towards someone else, its frequency rises.
- If you remove yourself from the sound source or reverse the frequency of sound drops.
13. How do Stringed Musical Instruments Create Music?
Different stringed instruments have strings that are stretched that are attached to them, like a violin. When you push down an instrument’s string using your fingers, the length will change, and it also vibrates at specific frequencies, generating distinct sounds if you apply a quick stroke with a metallic cord that produces an intense sound. However, a long stroke tends to create soft sounds. Additionally, the size of the string is important and determines the quality and volume.
14. How Do You Record The Sound Waves?
A microphone can transform audio waves into electrical signals that fall to rise with a specific pattern similar to the sound wave pattern you are trying to record. It is possible to store the auditory signals by recording analogy, where you record your sound wave pattern in the form of a wavy groove, which is then cut into a disc made of plastic. You can save the model in the form of a magnetic pattern and adhesive tape.
15. What exactly is a digital sound? And why is it superior to Analog Sound?
It is possible to record or send sound waves in a digital signal, which stores specific patterns of wanted sound waves in a digital series that you can save on a digital CD, tape or on a computer system. After playing the recorded signal, the recorded digital pattern transforms back to sound waves.
While analog recordings produce an exact replica of the sound wave pattern you want, making several replicas from the initial recordings could add additional noises and distort the original pattern. But digital recordings only have the pattern of numbers that can be copied and corrected should you need to repeat without distortion. Therefore, digital sound recording is always superior to analog recording).
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Sound Wave Fun Facts
- The study of sound waves is commonly referred to as acoustics.
- Sound waves change shape when they strike an object or the edges of the object.
- Light travels faster than sound, so we detect thunderbolts before we can hear their sound.
- Thomas Edison developed the first-ever audio recording. He recited the poem “Mary Had A Little Lamb on his phonograph in 1877.
- You can hear the various sounds because when the sound is heard in your ear, your ears also begin to vibrate.
- Fly’s ears aren’t even heard. They’re deaf.
- Bats make a series of clicks with high frequency, i.e. 12,000 Hz to 150,000 Hz, to locate themselves in the dark of night, and they possess highly perceptive ears which can detect the echo.
- Dogs ‘ ears are more sensitive than human ears, which means they can detect high-frequency sounds you can’t hear.
- Male grasshoppers emit an incredibly loud, rasping sound that ranges from around 7,000 up to 100,000 Hz by rubbing their hardened wingcases onto the pegs on their back legs. They listen to their ears which sit on their abdomens.
- Howler monkeys hoot at 400 Hz up to 6000 Hz.
- Frogs croak between 50 and 8000 Hz, while elephant trumpets go from between 10 and 10,000 Hz.
- Whales are able to communicate with each other underwater, and their sounds and songs travel for up to 800 km within the ocean.
- Baby cries up to the level of 115 decibels, and his voice is much louder than that of a car horn.
- If a human being could shout for eight years, seven months, eight years, and six days straight, he could create sound energy that would make a cup of coffee.
- The most raucous natural sounds that can be heard on the planet are caused by massive eruptions of volcanoes, like the eruption of a volcano in the islands of Krakatoa.