What is the Meaning of End Correction?

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Discussion Overview

The discussion revolves around the concept of 'End Correction' in the context of sound waves in pipes, particularly related to an experiment measuring the velocity of sound using a vibrating tuning fork and an air column in a tube. Participants seek to clarify the meaning and implications of end correction in this experimental setup.

Discussion Character

  • Exploratory, Technical explanation, Experimental/applied

Main Points Raised

  • One participant requests an explanation of 'End Correction' and its significance in sound wave experiments.
  • Another participant asks for clarification on the context in which 'End Correction' is being used.
  • A participant describes an experiment involving measuring sound velocity with a tuning fork and notes that the graph of length against frequency did not pass through the origin, attributing this to 'End Correction' as suggested by their teacher.
  • It is mentioned that in basic treatments of standing sound waves, the antinode is assumed to be at the end of the pipe, but this is complicated by the interaction of sound with the surrounding air, leading to the concept of 'End Corrections'.
  • A participant shares links to resources that may help explain 'End Correction' further.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the definition of 'End Correction', and the discussion remains exploratory with multiple viewpoints on its implications in the context of sound waves in pipes.

Contextual Notes

The discussion highlights the complexity of sound wave behavior in pipes and the influence of pipe geometry and air interaction, but does not resolve the specific definitions or calculations related to 'End Correction'.

bepunctual
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I wonder if someone could explain what is meant by 'End Correction'

Any help is appriciated! thanks
 
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In what context is the term being used?
 
We did an experiment to measure the velocity of sound by air colum by holding a vibrating tuning fork above a plastuc tube with one end in water. by moving the tube up and down we then found the shortest length of the air column that produced the loudest sound.

by plotting length against 1/f and finding the gradient of the line, we could find the velocity of sound. however the graph did not go through 0,0 and our teacher suggested this was due to 'end correction' but that we had to research what this meant.

I have looked in several books, and searched on the internet, but am unable to come up with an understandable meaning for me.

hope this helps!
 
That's what I thought you were talking about. In elementary treatments of standing sound waves in pipes, the antinode is treated as being exactly at the end of the pipe. But it's more complicated than that due to the interaction of the sound with the open air. It turns out that the "effective length" of a pipe depends on the geometry of the pipe end and how the air in the pipe interacts with the air outside the pipe. These are the "end corrections".

I had a bit of trouble myself trying to find something on the web to help you, but here's a start:
http://www.phys.unsw.edu.au/~jw/musFAQ.html#end
http://www.du.edu/~jcalvert/waves/pipes.htm
 
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