Measurements of the Acoustic Interference between Adjacent Microphones.

Abstract

An experimental technique is described to determine the disturbance to the response of one microphone due to the presence of a second identical microphone. The measurements were carried out in a free-field environment using plane waves incident normally onto the microphones and protection grids were used. The microphone diaphragms were coplanar and the spacing between the microphone centres was varied from one to sixteen microphone diameters. Amplitude deviations up to 1 dB and phase deviations up to 7 degrees have been measured. The magnitudes of the disturbances have been found to be in good agreement with theory. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1984
Accession Number
ADA156892

Entities

People

  • R. W. Copplestone

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustics
  • Amplitude
  • Anechoic Chambers
  • Boundaries
  • Free Field
  • Frequency
  • Generators
  • Measurement
  • Microphones
  • Noise Generators
  • Plane Waves
  • Scattering
  • Sound Pressure
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Structural Dynamics.

Technology Areas

  • Space