ISO 5135:2020

Name: ISO 5135:2020 — Acoustics — Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room
SKU: ISO 5135:2020
Price: 25 EUR
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Acoustics — Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room

Название (английский):

ISO 5135:2020

Acoustics — Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 12 августа 2020 г.
Издание:: ISO IS 5135 edition 3 version 1
ICS:: 17.140.20

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Описание (английский):

This document establishes general rules for the acoustic testing of air-terminal devices, air-terminal units, dampers and valves used in air diffusion and air distribution systems in order to determine sound power levels as defined in ISO 3741.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview - ISO 5135:2020 (Acoustics, air-terminal noise testing)

ISO 5135:2020 specifies general rules for measuring sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves used in air diffusion and distribution systems. It is intended for measurements carried out in a reverberation test room and is based on the precision-grade methods of ISO 3741. The third edition (2020) updates reference standards and adds guidance on measurement uncertainty and test setup elements.

Key topics and technical requirements

Scope and purpose: Determination of sound power levels for HVAC air-terminal products under steady-state operation; equipment volume limits relative to room volume (applicable up to 5% of room volume; special qualification if >2%).

Test environment: Use of reverberation test rooms qualified per ISO 3741; room qualification for broadband sound and guidance on simulating reflecting planes with heavy panels.

Mounting and installation: Defined mounting positions representative of normal use:

on/against a surface,
at intersection of surfaces,
away from surfaces,
equipment outside the room connected via a duct or opening. Minimum clearances (commonly 1.0 m to adjacent surfaces) and procedures for equipment located above ceilings are specified.

Ducted connections: If equipment is outside the room, connect via an unlined duct of at least 2 m or 5 effective diameters, whichever is greater, terminated flush with the test-room surface.

Airflow and accessories: Include normal air-flow control accessories (dampers, deflectors, straighteners). Airflow measurement methods (ANSI/ASHRAE or EN standards, ISO 5167 for flow metering) and a recommended two-step approach when flow-measuring devices generate noise.

Measurement details: Precision-grade sound power determination in octave or one‑third‑octave bands (typical mid-bands from 125 Hz to 8 000 Hz; optional lower bands like 63 Hz) and requirements for instrumentation, calculations, uncertainty assessment and reporting.

Reporting and uncertainty: Test report contents and an explicit clause on measurement uncertainty are included.

Applications and users

Who uses it: HVAC and ventilation product manufacturers, acoustic test laboratories, certification bodies, building services engineers, and consultants involved in noise performance of air distribution components.

Practical uses:

Product R&D and noise optimization of diffusers, dampers and terminal units
Type testing for product datasheets and compliance
Comparative evaluation of acoustic performance for HVAC selection and building acoustics design

Related standards (normative references)

ISO 3741 (reverberation-room sound power methods)

ISO 7235 (ducted silencers and air-terminal units)

ISO 5167 (flow measurement)

ANSI/ASHRAE 70, ANSI/ASHRAE 130

EN 12238, EN 12239, EN 1751

Keywords: ISO 5135:2020, acoustics, sound power level, reverberation test room, air-terminal devices, dampers, valves, HVAC noise testing, ISO 3741.

ISO 5135:2020

Abstract

Похожие стандарты

Overview - ISO 5135:2020 (Acoustics, air-terminal noise testing)

Key topics and technical requirements

Applications and users

Related standards (normative references)

Технические детали

BS EN ISO 3741:2010

Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure.…

ISO/TR 9464:2023

Guidelines for the use of ISO 5167:2022

ISO 7235:2003

Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units — Insertion loss, f…