ISO 80000-8:2020/PRF Amd 1

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ISO 80000-8:2020/PDF Amd1 refers to an amendment to the International Organization for Standardization (ISO) standard on quantities and units, specifically Part 8: Acoustics. "PDF" indicates the standard is available in Portable Document Format, a common file type for documents. "Amd1" means Amendment 1, which signifies a revision or correction to the original standard.