International Standard
ISO 20145:2026
Pneumatic fluid power — Test methods for measuring acoustic emission pressure levels of exhaust silencers
Reference number
ISO 20145:2026
Edition 2
2026-02
© ISO 2026
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Published (Edition 2, 2026)

ISO 20145:2026

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CHF 159
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Abstract

This document specifies two methods of measuring the level of acoustic pressure at the outlet of an exhaust silencer:

  • the first method, called "steady-state mode”, is intended to evaluate the noise level under steady state flow, i.e. constant upstream pressure (steady-state test according to ISO 6358-1);
  • the second method, called “discharge”, is intended to measure the noise level during the decrease of the pneumatic pressure (discharge test according to ISO 6358-2).

This document is applicable to pneumatic exhaust silencers and devices designed to reduce the sound produced by discharges of compressed air, entering in the scope of application of ISO 6358-1 and ISO 6358-2.

General information

  • Status
     : Published
    Publication date
     : 2026-02
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 34
  • Technical Committee :
    ISO/TC 131/SC 5
    ICS :
    23.100.99 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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