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Open Office Speech Privacy Calculator

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ASTM E1130 · ISO 3382-3:2012 · ANSI S3.5

0.5m10m20m
Silent libraryTypical officeSound masking

Office Layout

0m5m10m15m20mSL3.0m

Articulation Index

0.43AI

0.0 = no intelligibility · 1.0 = full intelligibility

Recommendations

  • •Install acoustic ceiling tiles with NRC ≥ 0.85 (current avg α = 0.11).
  • •Add workstation partitions ≥ 1.5m high with absorptive surfaces.
  • •Introduce sound masking at 40 dBA (current BGN = 35 dBA).
Speech Privacy Class
Poor
Per ASTM E1130
Speech Level at Listener45.4 dBA
Signal-to-Noise+10.4 dB
Articulation Index0.428
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ISO 3382-3 Parameters

Distraction distance, privacy distance, and spatial decay rate for open plan offices.

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Advisory only. All results require verification by a qualified acoustic professional.