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Sound Interference Lab

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Northern Illinois University

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7.07 Sound Interference La b

[Place your name here]

Purpose

To make observation of the effect of interference on sound waves.

Background

You have already observed how waves on a slinky can interfere with each other to get larger

(constructively) or smaller (destructively). Here is a video of slinky wave interference in slow

motion if you do not remember what it looks like. Since sound is indeed a wave, this same wave

property of interference applies to sound as well.

In this lab you will be listening to a series of sounds out of stereo speakers. In some cases the

two speakers will be playing the exact same sound, and in some cases they will be playing two

different sounds.

You will be using The Interference Lab Video to complete the lab.

Experimental

Part One - Two Identical Tones

In this first activity you will be looking at the effect the frequency of sound has on the spacing

between areas of constructive and destructive interference.

Diagram:

1. Make a hypothesis about what will happen to the spacing between areas of maximum

interference as the frequency of the sound changes.

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7.07 Sound Interference La b [Place your name here] Purpose To make observation of the effect of interference on sound waves. Background You have already observed how waves on a slinky can interfere with each other to get larger (constructively) or smaller (destructively). Here is a video of slinky wave interference in slow motion if you do not remember what it looks like. Since sound is indeed a wave, this same wave property of interference applies to sound as well. In this lab you will be listening to a series of sounds out of stereo speakers. In some cases the two speakers will be playing ...
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Tags: sound interference sound waves Identical Tones frequency of sound destructive interference

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