Measurement of Sound Intensity and Sound Power

Abstract

In this report the concept of a measurement technique for calculating sound intensity in the frequency domain is discussed and also how such a measurement system can be implemented in practice by using a frequency domain analyser. The technique described employs a dual-channel FFT analyser to obtain a cross power spectrum from the two microphones from which sound intensity is calculated. This approach enables a general-purpose FFT analyser together with a micro-computer to perform the function of a dedicated sound intensity analyser. The application of sound intensity measurement technique in sound power determination of a reference Source is presented.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1994
Accession Number
ADA279246

Entities

People

  • Vinh Trinh

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustics
  • Computer Programs
  • Computers
  • Diffraction
  • Dual Channel
  • Engineering
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Materials
  • Measurement
  • Microphones
  • Power Spectra
  • Spectra

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Systems Analysis and Design