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3B50.u1 - Interference Between Two Speakers

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​3B50.u1 - Interference Between Two Speakers

Preview
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Title3B50.u1 - Interference Between Two Speakers
Objective

Show an interference pattern made by two coherent sources.

StatusAvailable
Assembly Instructions

Connect a pair of speakers to a function generator with banana cables and banana plug multi-adapters and set it to a 2500 Hz sine wave. The speakers should be 1 meter apart.

Setup Time5
Operation Time5
Preview Time5
Operation Instructions

Turn the function generator on to 2500 Hz. Have students plug one ear and move their heads left and right (also up/down, and backward/forward). They will hear the minima and maxima produced by the interference of the two coherent sources.  The wavelength is on the order of ~8cm.

**Recommended Demo Addition**

3B50.u2 - Interference between two point sources - projectual

A visualization of what the sound waves are doing.

ExportableYes
Demo on DimeNo
PIRA 200Yes
Export Instructions (if different)
HazardsNone
Analysis/Information

​For a 2500 Hz sound, the wavelength is approximately 14 cm

Category3 Oscillations
Subcategory3B - Wave Motion
Keywordsmaxima, minima, sound waves
Construction Information
 
  
  
speaker
2
function generator
1
meter stick
1
banana cable
4
banana plug multi adapters
2