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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%>[[PiraScheme#WavesSound| Table of Waves and Sound Demonstration]]||<:30%>[[WSEquipmentList| Wave and Sound Equipment List]]||<:30%>[[Demonstrations|Lecture Demonstrations]]|| |
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| Wave Motion, [:WaveMotion#InterferenceOfSound: 3B55. Interference and Diffraction of Sound] | Wave Motion, [[WaveMotion#InterferenceOfSound| 3B55. Interference and Diffraction of Sound]] |
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| * '''Cabinet:''' [:WavesSoundCabinet: Waves and Sound (WS)] * '''Bay:''' [:WSCabinetRtBayA1:(A1 Right)] |
* '''Cabinet:''' [[WavesSoundCabinet| Waves and Sound (WS)]] * '''Bay:''' [[WSCabinetRtBayA1|(A1 Right)]] |
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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]|| || |
||Speakers Mounted on 1 m Bar on a Stand||[[WSCabinetRtBayA1| WS, Bay A1, Shelf T]]|| || ||Function Generator||[[EMCabinetLtBayB1| EM, Bay B1 Left, Shelf #2]]|| || |
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| * [https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel] | * [[https://www.youtube.com/user/LectureDemostrations/videos?view=1|Lecture Demonstration's Youtube Channel]] |
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| * [https://en.wikipedia.org/wiki/Interference_%28wave_propagation%29 Wikipedia - Interference] | * [[https://en.wikipedia.org/wiki/Interference_%28wave_propagation%29|Wikipedia - Interference]] |
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| [:Instructional:Home] | [[Instructional|Home]] |
Two Speaker Interference, 3B55.10
Topic and Concept:
Wave Motion, 3B55. Interference and Diffraction of Sound
Location:
Cabinet: Waves and Sound (WS)
Bay: (A1 Right)
Shelf: T
Abstract:
Two speakers driven from a common source are mounted at the ends of a 1 m rotatable bar.
Equipment |
Location |
ID Number |
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Speakers Mounted on 1 m Bar on a Stand |
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Function Generator |
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Coaxial Cables |
Located in rod and tackle cabinet near main lecture halls |
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Important Setup Notes:
- N/A
Setup and Procedure:
- Place stand on tabletop.
- Using a right-angle bracket, connect the 1 m bar with mounted speakers at the center to the stand.
- Plug in the function generator nearby.
- Connect the speakers to the function generator using BNC cables. Only one speaker needs to be connected (the two are connected internally).
- Choose a function (sine works well) and frequency.
- 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.
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Videos:
References: