ISO 20145:2026

February 2026

International standard Current

Pneumatic fluid power - Test methods for measuring acoustic emission pressure levels of exhaust silencers

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.

Main informations

Collections

International ISO standards

Publication date

February 2026

Reference

ISO 20145:2026

ICS Codes

23.100.99 Other fluid power system components

Sumary

Pneumatic fluid power - Test methods for measuring acoustic emission pressure levels of exhaust silencers

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.

Replaced standards (1)

ISO 20145:2019

October 2019

International standard Cancelled

Pneumatic fluid power - Test methods for measuring acoustic emission pressure levels of exhaust silencers

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); and — 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.

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