IEC 61260-2-2017 PDF

Full title and description

Electroacoustics — Octave‑band and fractional‑octave‑band filters — Part 2: Pattern‑evaluation tests (IEC 61260‑2:2016 with Amendment 1 published 2017). This part specifies the test procedures and pattern‑evaluation tests needed to verify that octave and fractional‑octave band filters meet the mandatory specifications given in IEC 61260‑1:2014.

Abstract

IEC 61260‑2 gives detailed test methods for confirming conformance of band‑pass filters (used in acoustic instruments) to the performance requirements defined in IEC 61260‑1:2014. It defines pattern evaluation procedures, acceptance intervals and the way measurement uncertainty is to be taken into account during type testing of class 1 and class 2 filter sets; the document was first published in 2016 and amended in 2017.

General information

• Status: Published / Valid (first edition published 23 March 2016; amended April 7, 2017).
• Publication date: Base publication 2016‑03‑23; Amendment 1 (A1) 2017‑04‑07.
• Publisher: International Electrotechnical Commission (IEC), TC 29 — Electroacoustics.
• ICS / categories: 17.140.50 (Electroacoustics).
• Edition / version: Edition 1.0 (2016); Amendment 1 issued 2017; consolidated CSV edition 1.1 (2017).
• Number of pages: Base standard: 49 pages; Amendment A1: 4 pages; consolidated CSV (base + amendment): 98 pages.

Scope

This part provides the pattern‑evaluation test procedures necessary to verify conformance to all mandatory specifications given in IEC 61260‑1:2014 for octave and fractional‑octave band filters. It applies to type (pattern) approval tests for class 1 and class 2 band‑pass filters and defines test signals, measurement set‑up, acceptance intervals and how to include measurement uncertainty in the conformity decision. The standard is intended to ensure consistent test practice across laboratories.

Key topics and requirements

• Pattern‑evaluation test procedures for octave and fractional‑octave filters (type approval testing).
• Specification of test signals, measurement apparatus and procedural steps for repeatable results.
• Criteria for evaluating passband relative attenuation, bandwidth, centre frequency and out‑of‑band attenuation against IEC 61260‑1 design goals.
• Definition and use of acceptance intervals together with maximum‑permitted expanded uncertainties of measurement for conformity decisions.
• Separate requirements and limits for class 1 and class 2 filters (different acceptance limits and environmental operation ranges).
• Reference to periodic and in‑service testing requirements given in IEC 61260‑3 for ongoing verification.

Typical use and users

Used by acoustic test laboratories, manufacturers of audio and acoustic instrumentation (spectrum analyzers, filter modules, sound level meters), calibration and conformity assessment bodies, and standards committees to perform type approval testing and to document that filter sets meet IEC 61260‑1 performance requirements. Also used by R&D teams designing analogue or digital octave/fractional‑octave filters.

Related standards

Key related documents include IEC 61260‑1:2014 (Part 1 — Specifications), IEC 61260‑3:2016 (Part 3 — Periodic tests), the earlier IEC 61260:1995 (superseded), and other electroacoustic standards such as IEC 61672‑1:2013 (sound level meters — specifications) which reference or depend on band‑filter performance.

Keywords

Octave‑band filters, fractional‑octave filters, band‑pass filters, pattern evaluation, type tests, electroacoustics, measurement uncertainty, class 1, class 2, IEC 61260.

FAQ

Q: What is this standard?

A: IEC 61260‑2 is Part 2 of the IEC 61260 series and defines pattern‑evaluation (type‑approval) test procedures for octave and fractional‑octave band filters; it is published as IEC 61260‑2:2016 with an Amendment 1 issued 2017.

Q: What does it cover?

A: It covers the detailed test methods, required test signals and measurement procedures used to verify that filter sets meet the mandatory specifications laid down in IEC 61260‑1:2014 (including how to treat measurement uncertainty and acceptance intervals).

Q: Who typically uses it?

A: Manufacturers of acoustic filters and instruments, independent and national test/calibration laboratories, conformity assessment bodies, and standards or R&D engineers working with octave/fractional‑octave filters and acoustic measurement systems.

Q: Is it current or superseded?

A: The 2016 first edition (with Amendment 1, 2017) replaces the 1995 edition and its 2001 amendment; the IEC webstore lists the 2016/2017 publication as the active edition (consolidated CSV edition also available). Users should check national adoptions for any later revisions or corrigenda.

Q: Is it part of a series?

A: Yes — IEC 61260 is a three‑part series: Part 1 (specifications), Part 2 (pattern‑evaluation tests) and Part 3 (periodic tests). These parts together replace the earlier single‑document IEC 61260 (1995).

Q: What are the key keywords?

A: Octave/fractional‑octave, band‑pass filter, pattern evaluation, type testing, class 1, class 2, measurement uncertainty, acceptance interval, electroacoustics.