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Acoustic Beamforming: Mapping Sources of Truck Noise (2009) / Chapter Skim
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Appendix C - Glossary of Special Terms
Pages 78-79

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From page 78...
... : The level of a constant sound that, in the given situation and time period, has the same average sound energy as does a time-varying sound. Specifically, equivalent sound level is the energy-averaged sound pressure level of the individual A-weighted sound pressure levels occurring during the specified time interval [units: dBA]
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From page 79...
... Standard octave band center frequencies in the audible range are 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, and 16,000 Hz. One-third octave: The interval between two sound frequencies having a ratio of the cube root of 2.
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Key Terms

  • octave band
  • sound level
  • microphone array
  • pressure level
  • sound energy

  • sound waves
  • band center
  • sound levels
  • frequency range
  • fourier transform

  • equivalent sound
  • constant sound
  • sound source
  • total energy
  • fast fourier

  • pressure levels
  • spherical spreading
  • octave bands
  • geometric mean
  • lower frequencies

  • frequency spectrum
  • discrete fourier
  • level obtained
  • logarithmic level
  • level measured

  • transient noise
  • constituent elements
  • standard octave
  • octave wide
  • reference pressure


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