![]() And these tuning fork experiments are great visual examples of how vibrations cause sound waves. Sound is an important physics concept that students will enjoy learning. Discuss what happens as the vibrations from the tuning fork reach the drum head.Then, have them strike the tuning fork and hold it about an inch above the drum.Have students sprinkle some salt on top of the drum.Secure the drum head with a rubber band.Make sure the drum head is stretched tightly over the base. Take the empty can (base) and cover the open end with plastic wrap (drum head).Tuning fork kit (includes tuning fork and rubber bands).Discuss: what happens to the ball as the tuning fork gets closer?įor this experiment, students will build a simple drum to demonstrate the way sound causes vibrations.This time have students strike the tuning fork and move it slowly toward the ping-pong ball.Without striking the tuning fork, move it toward the ping-pong ball. Have one student hold the string away from her body. ![]() Cut a string about 1-1 ½ feet long and tape one end of it to the ping-pong ball.Tuning fork kit (includes tuning fork, ping-pong ball and string).This activity explores how sound energy (vibrations) are transferred from the tuning fork to the ping-pong ball to make it move. The result: waves will form as the vibrations are transmitted through the water!.Have students activate the tuning fork again, and place it on the surface of the water (not submerged into it).Next, place the bowl of water on a paper towel.Show them how to use their hands to stop the vibrations of the tuning fork.Is the volume loud or soft? Does it make a high-pitch or low-pitch sound? Have students activate the tuning fork by striking it with a rubber mallet or on a block of wood, the heel of their hand, or the bottom of a shoe.We may not be able to see sound waves move through the air, but we can demonstrate how sound made by a tuning fork creates a pattern of waves in water. Volume - the loudness or softness of a sound Pitch - the highness or lowness of a sound One kit includes two tuning forks, a ping-pong ball, string, rubber bands, and a teacher’s guide.īefore starting the experiments, review the vocabulary below to make sure students are familiar with related terms.įrequency - the number of vibrations per second And our tuning fork kit is the perfect tool to conduct these experiments. In the activities below, students will use tuning forks to learn more about sound. Once a sound wave enters your ear canal and vibrates your eardrum, your brain interprets the vibrations as sound. Together, a collection of compressions and rarefactions form a sound wave. As the tine’s move back and forth at tremendous speeds, the vibrations press air molecules together - forming compressions - and force them apart - forming rarefactions. The tuning fork’s vibrations interact with the surrounding air to create sound. The vibrations are usually so fast that you can only see it in slow motion. When you strike it against a soft surface - like the bottom of a shoe or the palm of your hand - the tines vibrate back and forth several hundred times per second. And one way to demonstrate this relationship is by using tuning forks to conduct simple experiments.Ī tuning fork is an all-metal device that has a handle and two prongs, known as tines. ![]() Understanding the connection between sound and vibrations is an important science concept for students to know. And whether it’s the sound of a person’s voice, the sound of keys jingling, or the sound of a book slamming to the ground, sound is produced when objects vibrate. An anti node, um, is the opposite where the wave is free to move back and forth at the largest.Sound is all around us. There must be a node at the water level because that's where the wave stops. Um so, basically, um, what has to happen at the water level is what's called a note. Um, and the most fundamental frequency here would be 1/4 of a wavelength. You actually don't need all this information. But anyway, um, in order to figure out, um, what the frequency of the tuning forget is just based on the water level. That's how you can kind of tell where these things are. ![]() And then you would really hear a loud noise. If you actually did this in real life, you wouldn't really hear much until you created that standing wave. It basically looks like it's standing on, and that's standing wave is when you hear that very strong sound. A standing wave is basically a wave that is perfectly bouncing off and creating. If we take a tuning fork and we place it over top of an open pipe filled with water Um, what's gonna happen is we're gonna create what's called a standing wave. ![]()
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