Superposition of 2 Similar Frequencies from Separate Sources

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Discussion Overview

The discussion centers on the phenomenon of sound waves produced by two similar frequencies emitted from separate sources, specifically exploring the resulting interference patterns and the occurrence of beats. Participants consider the implications of superposition in a two-dimensional plane between the sources and whether this scenario can be effectively analyzed using vector fields.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the nature of sound interference when two similar frequencies are emitted from separate sources, suggesting an interest in the spatial characteristics of the sound waves.
  • Another participant asserts that beats can occur regardless of whether the frequencies originate from the same source or different sources.
  • A participant explains that beats arise from constructive and destructive interference, indicating that the sound pressure levels can be described as functions of time and space, leading to an interference pattern in the space between the sources.
  • One participant provides a practical example involving musicians tuning instruments, illustrating that beats are present when frequencies are not matched and disappear when they are tuned to the same frequency.

Areas of Agreement / Disagreement

Participants generally agree that beats can occur with frequencies from separate sources, but the discussion remains unresolved regarding the specifics of the interference pattern and the best approach to analyze the situation.

Contextual Notes

The discussion does not clarify the mathematical framework or assumptions necessary for a complete analysis of the interference patterns, nor does it resolve how to best represent the sound waves in a vector field context.

Xbehave
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If 2 sounds of similar freq are emited from the same source you get beats, but what happens if two sounds of similar freq are emited from separate sources. I realize that its just superposition but i can't figure out what it would be like in the space between the two sources.
Im happy to initially assume that the 2 amplitude are the same and only consider the 2d plane between the two sources.
Is this easy to solve?
Is this problem best considerd in vector fields? if so then how?
 
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The two frequencies do not have to be from the same source to get beats.
 
Beats happen because of constructive and destructive interference. You can describe the sound pressure level from each source as a function of time and space. If the sources are not in the same place then you will have an interesting interference pattern in space, but even so if you listen for a while at any single point you will hear the beat frequency.
 
Again there will be beats. An everyday illustration: Go somewhere where you can watch musicians manually tuning instruments, with respect to another instrument. The standard or reference instrument is one source, and the one being tuned is another, separated by some space. Tuning is done, the beats are gone - and as soon as beats are gone, they know, it's tuned

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