lifeoflashay8342 lifeoflashay8342
  • 15-12-2022
  • Engineering
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if the the noise level from a compressor is 83.98 dba with a controlling frequency of 900 hz, measured at 200 ft from the source, if you placed a wall 20 ft high, 15 ft away from the source, what is the new spl in dba?

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