Articles tagged “ASTM E1130”
3 articles covering ASTM E1130 in acoustic engineering and building design.
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GUIDES19 min read
Open Office Speech Privacy — Why You Can Hear Everything and How to Fix It
Your open office has an Articulation Index of 0.45 — that is Poor privacy. Here is the calculation per ASTM E1130 and the 3 changes that fix it.
March 15, 2026
speech privacyopen office
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GUIDES20 min read
Sound Masking Specification Guide — How to Write an Acoustic Masking Spec per ASTM E1130
A complete specification guide for sound masking systems in offices. Target levels, spectrum curves, speaker placement, and the ASTM E1130 framework.
March 15, 2026
sound maskingspecification
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TUTORIALS18 min read
Speech Privacy Index (SPI): How to Measure and Achieve Acoustic Privacy
A technical guide to the Speech Privacy Index (SPI) per ASTM E1130: how it relates to STI and AI, the three elements that determine privacy, privacy classification thresholds, and practical design strategies for offices, healthcare, and open plan environments.
March 14, 2026
speech privacySPI