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# Acoustics & Harmonics Labs

James Vanderburg. Danny Garcia. Dr. Brad Conrad, Dept. of Physics and Astronomy. The Science, Technology, Engineering, and Mathematics Talent Expansion Program (STEP). Overview. Edited Acoustic & Harmonic Labs for .

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## Presentation on theme: "Acoustics & Harmonics Labs"— Presentation transcript:

Slide1

Acoustics & Harmonics Labs

James Vanderburg

Danny Garcia

The Science, Technology, Engineering, and Mathematics Talent Expansion Program (STEP)

Slide2

Overview

Edited Acoustic & Harmonic Labs for

Phy

1812 and 1814Expanded the text / TroubleshootEasier to understand for non-majorsIncreased physics content Goal: To make labs simple yet entertainingMost students are musicians or recording majors

http://www.mediacollege.com/audio/images/loudspeaker-waveform.gif

Slide3

Labs

Position, Velocity, and Acceleration

Emphasizes use of graphs over equations

Hooke’s Law (two parts)Newton’s laws & spring oscillationF = ma and

Dampening of a springSpeed of SoundMeasured speed of sound.ReflectionsResonances

http://

http://www.patana.ac.th/secondary/science/anrophysics/ntopic4/images/spring%20air%20damping.gif

Slide4

Labs cont’d…

Helmholtz Resonators

Relationship between frequency and the shape of a container

Vibrating Strings

Explored sound waves using

a string to show waves move

in physical form

Examined waves on a stringFourier Processing of Music Fourier analysis using Audacity

music voice

http://people.rit.edu/andpph/photofile-sci/vibration-string-6249.jpg

Slide5

Laser Microphone

How it works:

Sound waves inside room cause window to vibrate

Laser bounces off window and back to receiver / photoreceptorReceiver converts back to soundlaser and bounces off of a window  window vibrates due to soundLaser reflection is modified

 Receiver picks up modified sound

http://farm4.static.flickr.com/3006/2965414094_54a15ec174.jpg

http://marinebio.org/i/sound/sound.jpg

http://justglasssite.com/glass-pics/window-7.jpg

Slide6

Laser Microphone Lab

How we will set up the lab:

Figures below illustrate basic idea

2 week lab to set up laser, and to collect dataPlan to make lab next semester

Slide7

Acknowledgments

We’d like to thank: