EN ISO 11689:1996 PDF

Overview

EN ISO 11689:1996 - "Acoustics - Procedure for the comparison of noise-emission data for machinery and equipment (ISO 11689:1996)" specifies methods and requirements to compare noise-emission data so noise-control performance can be determined for a family, type or group of machines. The standard defines which noise quantities to use (for example A‑weighted sound power LWA, A‑weighted emission sound pressure LpA, and C‑weighted peak Lpc,peak), how to collect representative data, present results, and evaluate them using statistical techniques (notably L‑lines and linear regression).

Key topics and technical requirements

• Scope and purpose: Provides a consistent procedure for comparing measured noise-emission data to assess noise‑control performance of machinery and equipment.
• Machine classification: Machines must be grouped into clearly defined families, groups and sub‑groups so each machine can be unambiguously assigned.
• Noise‑emission quantities: Principal quantities (LWA, LpA, Lpc,peak), additional spectra (octave/one‑third‑octave), surface emission levels and other specified quantities.
• Measurement methods: Use standardized noise test codes or basic standards (e.g. ISO 3740 series, ISO 11200, ISO 4871) and record measurement method, accuracy grade and operating conditions.
• Representativeness: Guidance on market coverage and data representativeness (committee decision when