Sound EnergySound Energy

Created by: Linnea, Winson, Glenn Created by: Linnea, Winson, Glenn at C.U.N.Y Brooklyn College at C.U.N.Y Brooklyn College

Fall 08’ Edu 713.22 O’ConnorFall 08’ Edu 713.22 O’Connor

What is sound energy?What is sound energy? Sound is a vibration or wave of air Sound is a vibration or wave of air

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

Sound EnergySound Energy

The picture on the left shows how sound is dispersed without any The picture on the left shows how sound is dispersed without any interference or movementinterference or movement

The picture on the right shows how sound waves clustered in the front, The picture on the right shows how sound waves clustered in the front, sound waves that are more clustered together produces louder sound sound waves that are more clustered together produces louder sound

Which explains why an ambulance sounds louder as it approaches usWhich explains why an ambulance sounds louder as it approaches us

Animation from: Animation from: http://http://www.kettering.edu/~drussell/Demos/doppler/doppler.htmlwww.kettering.edu/~drussell/Demos/doppler/doppler.html

FiliamentalityFiliamentality

The website helped us organize information about The website helped us organize information about sound in various categories:sound in various categories:

DescriptionDescription ExperimentsExperiments LessonsLessons InteractiveInteractive FunFun Interesting Sound Energy topicsInteresting Sound Energy topics

Students will be able to explore the website and Students will be able to explore the website and learn about sound energy with ease. This way learn about sound energy with ease. This way students can learn about sound energy at their students can learn about sound energy at their own pace in their own sequence.own pace in their own sequence.

Man Made Sound vs Nature Man Made Sound vs Nature SoundSound

Man Made Sound Man Made Sound HonkingHonking ScreamingScreaming DrillingDrilling Clanking of metalsClanking of metals

Nature SoundNature Sound RainRain Wind Wind OceanOcean JungleJungle

EchoEcho

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

From: From: http://science.howstuffworks.com/radar1.htmhttp://science.howstuffworks.com/radar1.htm

Echolocation Echolocation Echolocation is a way for Echolocation is a way for

animals to locate preys animals to locate preys using sound wavesusing sound waves

They emit sound pulses They emit sound pulses that bounces off their that bounces off their preys to determine the preys to determine the distance, size, and location distance, size, and location

Bats, Dolphins and Whales Bats, Dolphins and Whales are known to use are known to use EcholocationEcholocation

Pictures from:Pictures from:http://www.whaleresearch.com/thecenter/Facts00http://www.whaleresearch.com/thecenter/Facts002.html2.htmlhttp://www.eparks.org/wildlife_protection/wildlife_http://www.eparks.org/wildlife_protection/wildlife_facts/bats/echolocation.aspfacts/bats/echolocation.asp

Sonic Boom and the Sound Sonic Boom and the Sound BarrierBarrier

As a jet fighter exceeds the As a jet fighter exceeds the speed of sound, it pushes the air speed of sound, it pushes the air molecules away forming a white molecules away forming a white halo around the jet.halo around the jet.

An enormous sound is also An enormous sound is also generated when the sound generated when the sound waves are compressed and waves are compressed and cannot “get out of each other’s cannot “get out of each other’s way”way”

As you see on the bottom As you see on the bottom picture, because the jet is picture, because the jet is traveling than the speed of traveling than the speed of sound, a person won’t hear the sound, a person won’t hear the sound until the jet passes sound until the jet passes him/herhim/her

Pictures taken from:Pictures taken from:http://en.wikipedia.org/wiki/Sonic_boomhttp://en.wikipedia.org/wiki/Sonic_boom

Sonic Boom VideoSonic Boom Video

Here my own real Here my own real life experience of a life experience of a sonic boom on a sonic boom on a Navy ShipNavy Ship

As you can see, we As you can see, we don’t hear the don’t hear the explosion sound explosion sound until the jet passes until the jet passes us.us.

MST LESSON #1MST LESSON #1 In one of our MST Lessons: The students rotate around the various In one of our MST Lessons: The students rotate around the various

sound lab stations and make observations. They then have to make sound lab stations and make observations. They then have to make a holistic graph of one of the stations. Here is an example:a holistic graph of one of the stations. Here is an example:

Web 2.0Web 2.0The term "Web 2.0" describes the changing trends in the use of World Wide Web technology and web 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 design that aim to enhance creativity, communications, secure information sharing, collaboration and

functionality of the web.functionality of the web.

This websiteThis website

http://www.freesound.org/index.phphttp://www.freesound.org/index.php

Is a database where people can upload Is a database where people can upload sound snippets. You can hear a cat meow, sound snippets. You can hear a cat meow, or thunder clap.or thunder clap.

It is a great source for podcasters who want It is a great source for podcasters who want to find sound effects for their own to find sound effects for their own podcasts or share sound effects.podcasts or share sound effects.

MST LESSON #3MST LESSON #3

To pose questions about sound To pose questions about sound energy to students and have them energy to students and have them search the websearch the web

Students will use the Filiamentality Students will use the Filiamentality website to hunt for the answers for website to hunt for the answers for that particular website.that particular website.

InstructionsInstructions Give each student two Give each student two

pieces of paper with the pieces of paper with the exact same questions on exact same questions on each.each.

Allow students in small Allow students in small groups to discuss and groups to discuss and write down their answers write down their answers to the questions on one to the questions on one of the papers.of the papers.

After students have had After students have had the opportunity to discuss the opportunity to discuss possible answers to the possible answers to the questions; introduce the questions; introduce the different websites on the different websites on the board and allow them to board and allow them to search the internet and search the internet and see if their answers were see if their answers were correct.correct.

Web IntegrationWeb Integration

MST LESSON #4MST LESSON #4

This lesson is intended to have This lesson is intended to have students listen to various different students listen to various different kind of soundskind of sounds

It tests their knowledge on objects It tests their knowledge on objects that creates sound, their location and that creates sound, their location and to identify it: Pet Manipulative: Task to identify it: Pet Manipulative: Task 5, Unknown Objects 5, Unknown Objects

How Do We Hear Sound?How Do We Hear Sound?ExperimentExperiment DataData Place different audible objects Place different audible objects

throughout the classroom.throughout the classroom. Go to a different location ask Go to a different location ask

the students to close their the students to close their eyes and try to have them eyes and try to have them guess using their ears only guess using their ears only where in the classroom the where in the classroom the object is located.object is located.

After I return to my start point After I return to my start point they will then chart in their they will then chart in their science books what direction science books what direction they thought the sound came they thought the sound came from and what the object from and what the object sounds like it could be and sounds like it could be and what material it’s made of.what material it’s made of.

Online ResourcesOnline Resources

InteractiveInteractiveVirtual TourVirtual TourSound CardSound CardMuseumMuseumChicago Museum of SoundChicago Museum of SoundWeb 2.0Web 2.0Sound Energy HealingSound Energy HealingPudget Sound EnergyPudget Sound Energy