Determine the sound power level of the compressor

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Discussion Overview

The discussion revolves around determining the sound power level of a compressor based on its measured sound pressure level at a specific distance. It includes theoretical aspects of sound measurement and calculations related to sound levels at different distances.

Discussion Character

  • Homework-related, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant presents a scenario where a compressor has a sound pressure level of 68dB at 45m and seeks to determine the sound power level and power output.
  • Another participant emphasizes the need for the original poster to show their work and relevant equations before receiving help.
  • A participant shares their approach to a related part of the problem, using a formula to calculate expected sound pressure levels at different distances from the compressor.
  • A question is raised regarding the distinction between "sound pressure level" and "sound power level," along with a request for definitions and clarification on the units of the 68dB measurement.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the concepts of sound pressure level and sound power level, indicating that there is no consensus on these definitions or how to approach the calculations.

Contextual Notes

There are unresolved questions about the definitions of sound pressure level and sound power level, as well as the units associated with the 68dB measurement. The discussion also highlights the need for clarity in the equations used for calculations.

Who May Find This Useful

This discussion may be useful for students or individuals seeking to understand sound measurement concepts, particularly in the context of engineering or physics applications related to acoustics.

2idle
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A compressor installed in a large factory radiates sound uniformly. its sound pressure level at 45m away is measured as 68dB.

Determine (a) the sound power level of the compressor
(b) the power output of the compressor
 
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2idle said:
A compressor installed in a large factory radiates sound uniformly. its sound pressure level at 45m away is measured as 68dB.

Determine (a) the sound power level of the compressor
(b) the power output of the compressor


Welcome to the PF. You must show us your own work and thoughts, as well as the relevant equations, before we can offer any tutorial help. How would you approach this problem?
 
OK You've rumbled me, however I'm by no means after a fast easy way to complete an assignment as I've spent the last 6 hours on this question.
There was a third part to the question but I'm feeling quite confident about this
the third part was, determine the expected sound prssure level at 10m and 100m from the compressor.

To complete this part I used the formula -- L2 = L1-20log r2/r1

Where L2 is the new sound level at the new distance
L1 is the sound level at the reference distance
r1 is the reference distance from the source
r2 is the new distance from the source
 
What is the difference between "sound pressure level" at a distance, and the "sound power level of the compressor"? I'm not that familiar with the terms, so if you could show us the defining equations, that will help. And what units is the "68dB" number in? dB what?
 

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