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Sound is all about vibration. Sound wave consists of vibrating particles. These knock into other particles causing them to vibrate, and so the sound can travel away from the source. You can hear sound because the vibrations in the air cause your ear drums to vibrate. We will definitely have to give it a try! We really enjoy hearing how you are connecting what you learn in school with what you learn in Wonderopolis! We're so proud of you for learning a new vocabulary word amplitude , Jack!
That video you got to watch in science class sounds really neat, too! It's true that lots of people don't understand the damage they can do to their hearing by playing their digital music devices too loudly. We really liked the words you used to describe this Wonder, Haley! We also think it's super cool that you and your "MC" classmates are studying sound and that you know a little bit more about it after exploring this Wonder!
What a great comment, Sara! Thank you for sharing your background knowledge about sound energy Caplin is really awesome for introducing you guys to this Wonder when you are studying about the subject in school! We're pretty sure there are many reasons why people are deaf or can become deaf. We think the damaging of hair cells in just one of the causes of hearing loss. Hi there, Muna! We search all over the internet to find the best video to go with each Wonder of the Day.
This one was pretty cool, wasn't it? The person who made this video posted it to the website we found it on back in October of We can't say for sure when the video was made, but that's when it first got posted online.
Thanks so much for commenting today! You bet, Muna Abdi! It's pretty cool to hear all those sounds put together like that, isn't it, Muna Abdi?
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What makes sounds louder? What is a sound wave? What is amplitude? Tags: See All Tags amplitude , intensity , molecule , pluck , reaction , vibration , volume. Look at the following pairs and decide which item has greater amplitude : yell or whisper siren or cat meow mosquito buzz or car alarm fireworks or violin Colorado University recently studied a small group of iPod users.
Wonder What's Next? Try It Out You can hear sound with your ears, but can you feel sound? Did you get it? Test your knowledge. Wonder Words volume vibration particle reaction amplitude intensity molecule pluck forcefully Take the Wonder Word Challenge. Join the Discussion. User Oct 15, Oct 22, Thanks, User Tyler Apr 12, That means there is no amplitude. There is only rarefaction, compression, and wavelength.
Sorry, but you must be thinking that sound waves are transverse. Sorry, I am a nerd and just want to help wonderopolis out. Apr 12, Poan Poan Mar 22, Apr 2, The following is how you would cite this page: "What Makes Sound Louder? OK, first of all sound waves are longitudinal waves which can not be referenced as a ocean wave as those are transverse. Mar 20, Athena Nov 14, Bluestar Nov 21, Nov 26, Nov 16, And we love having you as a Wonder Friend!! Nov 8, Thanks, blah.
Alaskan May 12, May 18, Canadian Mar 24, Mar 25, We're glad you thought so, Canadian! Thanks for stopping by Wonderopolis! It was amazing. I love it. I learned that a mp3 player can be as loud as a rock concert. Wonderopolis Jan 15, I loved the rhythm in the video! I love Wonderopolis! I loved the video. Me and my family make a lot of sound in the house.
I love your video. I think it was so good, and I am learning about it in class. I learned to never turn it up so high. Hi, I loved the video. I didn't know that that when sound is really loud it can damage hair cells in the inner ear. I can't wait to see more wonders. We have 1, Wonders for you to explore. I loved this video, and I am learning about sound in school and vibrations.
But I never knew that sound is a type of energy made by vibration! I didn't know how sound could effect yours ears like that. I Learned more things. I loved it. That video was cool with epic sounds. I loved hearing the sounds. I am learning about sound in class. I learned that sound can hurt your ears pretty bad. I think the next wonder will be about fractions. I like videos like that!!! Wonderopolis Jan 14, Really cool video you guys! I loved the beat. I play an electric guitar.
So, I should know that when you pluck a string hard you'll get more energy. And when you pluck the string softly your using less energy.
I learned that if you turn the volume up too loud, it can damage your ear. Comment: I loved your video. I did not now that you could turn music that loud, it could damage your ears. Wonderopolis Jan 10, I loved the video you guys made.
I learned that if sound is too loud it can damage your ears. Wonderopolis Jan 30, Naya Dec 11, This is the by far coolest video I've ever seen I have to watch it more than twice!!!!
Wonderopolis Dec 11, Julie May 28, Wonderopolis May 28, You're welcome, Julie! Julie May 27, I loved this wonder so much! How do you make the smileys? Wonderopolis May 14, SrikarMC Feb 15, Hi this is Srikar from Mrs. Caplin's Class. The video was phenomenal. It was really cool how those two guys made music from ordinary things. Caplin chose this wonder. I learned that amplitude is the height of the sound wave.
I visualized drawing the ocean waves and it helped me understand crest and troughs and that helped me understand amplitude. Wonderopolis Feb 16, McKenna MC Feb 15, Hi Wonderopolis! This is McKenna from Mrs. Caplin's class. Even though we learned some of these facts already, I'm still open to new learning.
Some of the new facts I learned were what amplitude means and is. It isn't the same thing as volume. Volume is the intensity of vibration, and amplitude is the height of a sound wave. I also learned that when you make a sound, it vibrates, and causes the air particles to move around. The last thing I learned was that over time, loud noises can damage the hair in your ears.
Now I have just a few questions. What's the instrument with the greatest amplitude? Does an amplifier relate to amplitude? Are people deaf because they were born without any hair cells in their ear? I learned many new and interesting facts.
Jillian MC Feb 15, My teacher, Mrs. Caplin, must have had my class and I write about this wonder because we've been learning about different types of energy, and this week was all about sound energy. I've enjoyed reading this wonder tremendously, and have learned some very important facts.
One of my facts is that volume is the intensity of a sound wave. I also learned that vibrating particles make up the sound that we hear everyday. Something I noticed that was funny to me is that you've connected vibrations with musical instruments and in class we did the same thing! Thank you again for this wonderful wonder!!! Leah MC Feb 15, I'm back!!
A few minutes ago, I went up to my mom and told her "Tonight is extraordinarily loud- that must mean that the amplitude is producing much more than usual".
She stared at me for about ten seconds then said "Um, ok, that's great, dear" with a confused look on her face, so she wasn't shocked or thought I was a person with a collage diploma. Really I think she thought I was talking gibberish. I don't think I'll be talking sciencey and smart anymore. What an excellent video- I especially liked it because it gave you a wonderful visual of what sound really is-considering the fact that in science in our class Mrs. Caplin's class, that is we are learning about sound and sound energy-but we haven't come across anything about the hairs in your ears-I never really thought there were tiny hair cells in my ear and that's why I can hear.
I found that very interesting and a little gross, but sometimes science is gross. I wonder if that is why when you push your ears down tight enough so you can't hear the hair gets smushed so they don't receive as many sound waves as they normally would when you're not covering your ears.
One time when I went to a concert there were so many people shouting and screaming that even when I covered my ears the sound waves still came through. I also never knew about the vocab word amplitude. We have never talked about it in science so it was very new to me when I figured out that volume depends on it. Tonight I can go up to my parents and act all sciencey and smart and say-"wow today is extraordinary loud, that must mean the amplitude is producing much more than normal.
I'll try to write back to you and tell you what happens with acting all sciencey and smart. I learned a lot- so thanks a lot!!!!!!!!!!! Eric MC Feb 15, Hi, I'm Eric from Mrs. I've learned that when you turn the volume up on a television, you're actually turning the amplitude.
We started to learn about sound energy yesterday in science class but we never learned about amplitude which means the height of a sound wave. I also learned that when air particles vibrate,they bump into other particles near them.
As the first ring expands forward, it pulls the rings behind it forward, causing a compression wave. Sound waves are composed of compression and rarefaction patterns. Compression happens when molecules are densely packed together. Alternatively, rarefaction happens when molecules are distanced from one another. As sound travels through a medium, its energy causes the molecules to move, creating an alternating compression and rarefaction pattern. It is important to realize that molecules do not move with the sound wave.
As the wave passes, the molecules become energized and move from their original positions. During compression there is high pressure, and during rarefaction there is low pressure. Different sounds produce different patterns of high- and low-pressure changes, which allows them to be identified.
The wavelength of a sound wave is made up of one compression and one rarefaction. Sound waves lose energy as they travel through a medium, which explains why you cannot hear people talking far away, but you can hear them whispering nearby. As sound waves move through space, they are reflected by mediums, such as walls, pillars, and rocks.
This sound reflection is better known as an echo. This is due to the large rock walls reflecting your sound off one another.
So what type of wave is sound? Sound waves fall into three categories: longitudinal waves, mechanical waves, and pressure waves. Keep reading to find out what qualifies them as such. If you push a slinky back and forth, the coils move in a parallel fashion back and forth. Similarly, when a tuning fork is struck, the direction of the sound wave is parallel to the motion of the air particles.
A mechanical wave is a wave that depends on the oscillation of matter, meaning that it transfers energy through a medium to propagate. These waves require an initial energy input that then travels through the medium until the initial energy is effectively transferred. Examples of mechanical waves in nature include water waves, sound waves, seismic waves and internal water waves, which occur due to density differences in a body of water.
There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves. Why is sound a mechanical wave? Sound waves move through air by displacing air particles in a chain reaction. As one particle is displaced from its equilibrium position, it pushes or pulls on neighboring molecules, causing them to be displaced from their equilibrium. As particles continue to displace one another with mechanical vibrations, the disturbance is transported throughout the medium.
These particle-to-particle, mechanical vibrations of sound conductance qualify sound waves as mechanical waves. Sound energy, or energy associated with the vibrations created by a vibrating source, requires a medium to travel, which makes sound energy a mechanical wave. A pressure wave, or compression wave, has a regular pattern of high- and low-pressure regions. Because sound waves consist of compressions and rarefactions, their regions fluctuate between low and high-pressure patterns.
For this reason, sound waves are considered to be pressure waves. For example, as the human ear receives sound waves from the surrounding environment, it detects rarefactions as low-pressure periods and compressions as high-pressure periods.
Transverse waves move with oscillations that are perpendicular to the direction of the wave. Sound waves are not transverse waves because their oscillations are parallel to the direction of the energy transport; however sound waves can become transverse waves under very specific circumstances.
Transverse waves, or shear waves, travel at slower speeds than longitudinal waves, and transverse sound waves can only be created in solids. Ocean waves are the most common example of transverse waves in nature. A more tangible example can be demonstrated by wiggling one side of a string up and down, while the other end is anchored see standing waves video below.
Still a little confused? Check out the visual comparison of transverse and longitudinal waves below. Create clearly defined nodes, illuminate standing waves, and investigate the quantum nature of waves in real-time with this modern investigative approach. You can check out some of our favorite wave applications in the video below. What makes music different from noise? And, we can usually tell the difference between ambulance and police sirens - but how do we do this?
We use the four properties of sound: pitch, dynamics loudness or softness , timbre tone color , and duration. It provides a method for organizing sounds based on a frequency-based scale. Pitch can be interpreted as the musical term for frequency, though they are not exactly the same.
A high-pitched sound causes molecules to rapidly oscillate, while a low-pitched sound causes slower oscillation. Pitch can only be determined when a sound has a frequency that is clear and consistent enough to differentiate it from noise. The amplitude of a sound wave determines it relative loudness.
In music, the loudness of a note is called its dynamic level. In physics, we measure the amplitude of sound waves in decibels dB , which do not correspond with dynamic levels. Higher amplitudes correspond with louder sounds, while shorter amplitudes correspond with quieter sounds. Despite this, studies have shown that humans perceive sounds at very low and very high frequencies to be softer than sounds in the middle frequencies, even when they have the same amplitude.
Sounds with various timbres produce different wave shapes, which affect our interpretation of the sound. The sound produced by a piano has a different tone color than the sound from a guitar. In physics, we refer to this as the timbre of a sound. In music, duration is the amount of time that a pitch, or tone, lasts. They can be described as long, short, or as taking some amount of time.
The duration of a note or tone influences the timbre and rhythm of a sound.
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