Sound Energy Created by: Linnea, Winson, Glenn at C.U.N.Y Brooklyn College Fall 08’ Edu O’Connor

What is sound energy? Sound is a vibration or wave of air molecules caused by the motion of an object. The wave is a compression wave where the density of the molecules is higher. This wave travels through the air at a speed dependent on the temperature. A sound wave contains energy, which in turn means it can make things move. However, if the wave strikes something solid, the wave will bounce back -- an echo. Sound energy can be changed into other forms of energy, e.g. electrical energy, and vice versa; this is one of its properties that allow us to communicate by telephone. Sound is a vibration or wave of air molecules caused by the motion of an object. The wave is a compression wave where the density of the molecules is higher. This wave travels through the air at a speed dependent on the temperature. A sound wave contains energy, which in turn means it can make things move. However, if the wave strikes something solid, the wave will bounce back -- an echo. Sound energy can be changed into other forms of energy, e.g. electrical energy, and vice versa; this is one of its properties that allow us to communicate by telephone.

Sound Energy The picture on the left shows how sound is dispersed without any interference or movement The picture on the left shows how sound is dispersed without any interference or movement The picture on the right shows how sound waves clustered in the front, sound waves that are more clustered together produces louder sound The picture on the right shows how sound waves clustered in the front, sound waves that are more clustered together produces louder sound Which explains why an ambulance sounds louder as it approaches us Which explains why an ambulance sounds louder as it approaches us Animation from:

Filiamentality The website helped us organize information about sound in various categories: Description Description Experiments Experiments Lessons Lessons Interactive Interactive Fun Fun Interesting Sound Energy topics Interesting Sound Energy topics Students will be able to explore the website and learn about sound energy with ease. This way students can learn about sound energy at their own pace in their own sequence.

Man Made Sound vs Nature Sound Man Made Sound Honking Honking Honking Screaming Screaming Screaming Drilling Drilling Drilling Clanking of metals Clanking of metals Clanking of metals Clanking of metals Nature Sound Rain Rain Rain Wind Wind Wind Ocean Ocean Ocean Jungle Jungle Jungle

Echo When you shout into a well, the sound of your shout travels down the well and is reflected (echoes) off the surface of the water at the bottom of the well. If you measure the time it takes for the echo to return and if you know the speed of sound, you can calculate the depth of the well fairly accurately. When you shout into a well, the sound of your shout travels down the well and is reflected (echoes) off the surface of the water at the bottom of the well. If you measure the time it takes for the echo to return and if you know the speed of sound, you can calculate the depth of the well fairly accurately. From: From:

Echolocation Echolocation is a way for animals to locate preys using sound waves Echolocation is a way for animals to locate preys using sound waves They emit sound pulses that bounces off their preys to determine the distance, size, and location They emit sound pulses that bounces off their preys to determine the distance, size, and location Bats, Dolphins and Whales are known to use Echolocation Bats, Dolphins and Whales are known to use Echolocation Pictures from: bats/echolocation.asp bats/echolocation.asp

Sonic Boom and the Sound Barrier As a jet fighter exceeds the speed of sound, it pushes the air molecules away forming a white halo around the jet. As a jet fighter exceeds the speed of sound, it pushes the air molecules away forming a white halo around the jet. An enormous sound is also generated when the sound waves are compressed and cannot “get out of each other’s way” An enormous sound is also generated when the sound waves are compressed and cannot “get out of each other’s way” As you see on the bottom picture, because the jet is traveling than the speed of sound, a person won’t hear the sound until the jet passes him/her As you see on the bottom picture, because the jet is traveling than the speed of sound, a person won’t hear the sound until the jet passes him/her Pictures taken from: Pictures taken from:

Sonic Boom Video Here my own real life experience of a sonic boom on a Navy Ship Here my own real life experience of a sonic boom on a Navy Ship As you can see, we don’t hear the explosion sound until the jet passes us. As you can see, we don’t hear the explosion sound until the jet passes us.

MST LESSON #1 In one of our MST Lessons: The students rotate around the various sound lab stations and make observations. They then have to make a holistic graph of one of the stations. Here is an example: In one of our MST Lessons: The students rotate around the various sound lab stations and make observations. They then have to make a holistic graph of one of the stations. Here is an example:

Web 2.0 The term "Web 2.0" describes the changing trends in the use of World Wide Web technology and web design that aim to enhance creativity, communications, secure information sharing, collaboration and functionality of the web. This website Is a database where people can upload sound snippets. You can hear a cat meow, or thunder clap. It is a great source for podcasters who want to find sound effects for their own podcasts or share sound effects.

MST LESSON #3 To pose questions about sound energy to students and have them search the web To pose questions about sound energy to students and have them search the web Students will use the Filiamentality website to hunt for the answers for that particular website. Students will use the Filiamentality website to hunt for the answers for that particular website.

Instructions Give each student two pieces of paper with the exact same questions on each. Give each student two pieces of paper with the exact same questions on each. Allow students in small groups to discuss and write down their answers to the questions on one of the papers. Allow students in small groups to discuss and write down their answers to the questions on one of the papers. After students have had the opportunity to discuss possible answers to the questions; introduce the different websites on the board and allow them to search the internet and see if their answers were correct. After students have had the opportunity to discuss possible answers to the questions; introduce the different websites on the board and allow them to search the internet and see if their answers were correct. Web Integration Web Integration

MST LESSON #4 This lesson is intended to have students listen to various different kind of sounds This lesson is intended to have students listen to various different kind of sounds It tests their knowledge on objects that creates sound, their location and to identify it: Pet Manipulative: Task 5, Unknown Objects It tests their knowledge on objects that creates sound, their location and to identify it: Pet Manipulative: Task 5, Unknown Objects

How Do We Hear Sound? ExperimentData Place different audible objects throughout the classroom. Place different audible objects throughout the classroom. Go to a different location ask the students to close their eyes and try to have them guess using their ears only where in the classroom the object is located. Go to a different location ask the students to close their eyes and try to have them guess using their ears only where in the classroom the object is located. After I return to my start point they will then chart in their science books what direction they thought the sound came from and what the object sounds like it could be and what material it’s made of. After I return to my start point they will then chart in their science books what direction they thought the sound came from and what the object sounds like it could be and what material it’s made of.

Online Resources Interactive Virtual Tour Virtual Tour Virtual Tour Virtual Tour Sound Card Sound Card Sound Card Sound CardMuseum Chicago Museum of Sound Chicago Museum of Sound Chicago Museum of Sound Chicago Museum of Sound Web 2.0 Sound Energy Healing Sound Energy Healing Sound Energy Healing Sound Energy Healing Pudget Sound Energy Pudget Sound Energy Pudget Sound Energy Pudget Sound Energy