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Sound Radiation and Propagation

Sound Radiation and Propagation

Far field sound pressure on-axis

  • SPL sensitivity at 1W and 1m on-axis
  • Mean level in frequency band
  • Effective frequency range

Directional radiation characteristics

  • Off-axis far field SPL response
  • Directional response pattern
  • Polar and balloon plots
  • Coverage and radiation angle
  • Directivity index
  • Sound power response

Near field measurement

  • Extrapolated far-field SPL response
  • Low frequency measurements without anechoic condition
  • Splicing near-field/ far-field measurement
  • Merging multiple sound sources
  • Distortion measurements at high SNR

Area of radiation

  • Effective radiation area Sd

Radiation analysis

  • Far field SPL-response generated in a half space
  • Directivity index, sound power response
  • Polar and balloon plot
  • In-phase component (constructive contribution to SPL)
  • Anti-phase component (destructive contribution to SPL)
  • Quadrature component (no contribution to SPL)