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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)