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||<:30%>[[PiraScheme#WavesSound| Table of Waves and Sound Demonstration]]||<:30%>[[WSEquipmentList| Wave and Sound Equipment List]]||<:30%>[[Demonstrations|Lecture Demonstrations]]|| ||<30%  style="text-align:center">[[PiraScheme#WavesSound|Table of Waves and Sound Demonstration]] ||<30%  style="text-align:center">[[WSEquipmentList|Wave and Sound Equipment List]] ||<30%  style="text-align:center">[[Demonstrations|Lecture Demonstrations]] ||
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'''Topic and Concept:'''
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'''Topic and Concept:'''
  Wave Motion, [[WaveMotion#InterferenceOfSound| 3B55. Interference and Diffraction of Sound]]		  . Wave Motion, [[WaveMotion#InterferenceOfSound|3B55. Interference and Diffraction of Sound]]

'''pira200 Listed'''
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 * '''Cabinet:''' [[WavesSoundCabinet| Waves and Sound (WS)]]
* '''Cabinet:''' [[WavesSoundCabinet|Waves and Sound (WS)]]
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||<:style="width: 60%" :40%>'''Equipment'''||<:30%>'''Location'''||<:25%>'''ID Number'''||		 ||<40% style="&quot; ;text-align:center">'''Equipment''' ||<30%  style="text-align:center">'''Location''' ||<25%  style="text-align:center">'''ID Number''' ||
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||Speakers Mounted on 1 m Bar on a Stand||[[WSCabinetRtBayA1| WS, Bay A1, Shelf T]]|| ||
||Function Generator||[[EMCabinetLtBayB1| EM, Bay B1 Left, Shelf #2]]|| ||
||Coaxial Cables||Located in rod and tackle cabinet near main lecture halls|| ||		 ||Speakers Mounted on 1 m Bar on a Stand ||[[WSCabinetRtBayA1|WS, Bay A1, Shelf T]] || ||
||Function Generator ||[[EMCabinetLtBayB1|EM, Bay B1 Left, Shelf #2]] || ||
||Coaxial Cables ||Located in rod and tackle cabinet near main lecture halls || ||
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'''''Important Setup Notes:'''''
 * N/A
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'''Setup and Procedure:'''  '''''Important Setup Notes:'''''

 * N/A

'''Setup and Procedure:'''
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'''Discussion:''' 		 '''Discussion:'''
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|| {{attachment:TwoSpeakerInterference02-250.jpg}} || {{attachment:TwoSpeakerInterference03-250.jpg}} || {{attachment:TwoSpeakerInterference04-250.jpg}} ||
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||{{attachment:TwoSpeakerInterference02-250.jpg}}||{{attachment:TwoSpeakerInterference03-250.jpg}}||{{attachment:TwoSpeakerInterference04-250.jpg}}||
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 * [[https://en.wikipedia.org/wiki/Interference_%28wave_propagation%29|Wikipedia - Interference]]
  * [[https://en.wikipedia.org/wiki/Interference_(wave_propagation)|Wikipedia - Interference]]

Table of Waves and Sound Demonstration

Wave and Sound Equipment List

Lecture Demonstrations

Two Speaker Interference, 3B55.10

Topic and Concept:

pira200 Listed

Location:

TwoSpeakerInterference01-400.jpg

Abstract:

Two speakers driven from a common source are mounted at the ends of a 1 m rotatable bar.

Equipment

Location

ID Number

Speakers Mounted on 1 m Bar on a Stand

WS, Bay A1, Shelf T

Function Generator

EM, Bay B1 Left, Shelf #2

Coaxial Cables

Located in rod and tackle cabinet near main lecture halls

Important Setup Notes:

  • N/A

Setup and Procedure:

  1. Place stand on tabletop.
  2. Using a right-angle bracket, connect the 1 m bar with mounted speakers at the center to the stand.
  3. Plug in the function generator nearby.
  4. Connect the speakers to the function generator using BNC cables. Only one speaker needs to be connected (the two are connected internally).
  5. Choose a function (sine works well) and frequency.
  6. You can move locations of constructive and destructive interference by rotating the 1 m (need to loosen right-angle clamp first).

Cautions, Warnings, or Safety Concerns:

  • N/A

Discussion:

Sound waves obey the principle of superposition. When two sound (pressure) waves encounter one another, they interfere. Spatially, the resultant wave has alternating spots of constructive and destructive interference.

TwoSpeakerInterference02-250.jpg

TwoSpeakerInterference03-250.jpg

TwoSpeakerInterference04-250.jpg

Videos:

References:

Home

fw: Two_Speaker_Interference (last edited 2018-07-18 18:49:31 by srnarf)