ISO TR 22520-2005 PDF

Full title and description

Portable hand-held forestry machines — A-weighted emission sound pressure levels at the operator's station — Comparative data in 2002. This Technical Report compiles measured and manufacturer-supplied A-weighted emission sound pressure levels for portable, hand-held forestry machines (chain saws, brush-cutters and grass-trimmers) to provide baseline comparative data from the year 2002.

Abstract

ISO/TR 22520:2005 presents comparative data (year 2002) on the A-weighted emission sound pressure levels measured at the operator position for portable hand‑held forestry machinery. It is informative (Technical Report) and intended to help manufacturers and designers assess achievable noise levels and to support the requirement in related standards that such machines be designed to generate noise "as low as practicable". The values are not market limits or exposure limits but representative comparative data drawn from manufacturers and other official sources.

General information

• Status: Withdrawn (ISO lifecycle: Withdrawal of International Standard [95.99]).
• Publication date: January 2005 (first edition).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.140 (Noise with respect to human beings); 17.140.20 (Acoustical and vibration measurements); 65.060.80 (Forestry equipment).
• Edition / version: Edition 1 (2005-01).
• Number of pages: 9.

Scope

The report provides comparative A-weighted emission sound pressure level data for portable hand‑held forestry machines (chain saws, brush‑cutters and grass‑trimmers) based on information collected for the year 2002. It is intended to assist designers, manufacturers and standards bodies in assessing achievable noise levels and in supporting "as low as practicable" design objectives in related safety and noise standards.

Key topics and requirements

• Compilation of A-weighted emission sound pressure levels measured at the operator position for chain saws, brush‑cutters and grass‑trimmers (data representative of 2002 markets).
• Informative guidance to support the design objective that machines be made to emit noise "as low as practicable".
• Clarification that values are comparative/informative (not regulatory limit or exposure values) and are based on manufacturer and official source data.
• Intended use to support design decisions, declarations by manufacturers and comparison between machine families or models.

Typical use and users

Primary users include machine designers and manufacturers of portable forestry equipment, standards developers and test laboratories seeking historical comparative noise data, and regulatory or procurement bodies that require background information on achievable noise levels for hand‑held forestry machines.

Related standards

ISO/TR 22520 is associated with ISO safety and test standards for portable forestry machines, notably ISO 11681 (portable chain‑saw safety), ISO 11806 (brush‑cutters and grass‑trimmers) and the noise test codes such as ISO 22868 (noise test code for portable hand‑held machines) and its later revisions; ISO/TR 22520 provides comparative data to inform those standards and design objectives. It is part of the ISO/TC 23/SC 17 body of work on manually portable forest machinery and is companion to related technical reports (for example, ISO/TR 22521 on vibration data).

Keywords

portable hand-held forestry machines; chain saw; brush-cutter; grass-trimmer; A-weighted emission sound pressure level; operator position; noise data; comparative data; ISO/TC 23/SC 17.

FAQ

Q: What is this standard?

A: ISO/TR 22520:2005 is a Technical Report that compiles comparative A-weighted emission sound pressure level data (operator position) for portable hand‑held forestry machines based on information collected for the year 2002. It is informative rather than prescriptive.

Q: What does it cover?

A: It covers measured and manufacturer‑reported A-weighted emission sound pressure levels at the operator position for chain saws, brush‑cutters and grass‑trimmers, presenting representative comparative values from 2002 to support design and declaration activities. The document does not set limit or exposure values.

Q: Who typically uses it?

A: Machine designers and manufacturers, standards developers, test laboratories and procurement/regulatory personnel who need background comparative noise data for manually portable forestry machines.

Q: Is it current or superseded?

A: ISO/TR 22520:2005 is listed as Withdrawn in the ISO catalogue. Noise test codes and measurement methods have been updated in later standards (for example the ISO 22868 family and its subsequent revisions), which provide current test procedures and updated data; users should consult the latest ISO test‑code standards and relevant TC/SC publications for current normative requirements.

Q: Is it part of a series?

A: Yes — it was prepared by ISO/TC 23, Subcommittee SC 17 (Manually portable forest machinery) and is a companion document to related TRs and ISO standards addressing noise and vibration (for example ISO/TR 22521 on vibration data and ISO 22868 noise test codes). It forms part of the SC 17 body of work on portable forestry machinery.

Q: What are the key keywords?

A: A-weighted emission sound pressure level; operator position; portable hand-held forestry machines; chain saw; brush-cutter; grass-trimmer; comparative data; noise test code; ISO/TC 23/SC 17.