ANSI ASA S1.11-2016 part 3 PDF

Full title and description

ANSI/ASA S1.11-2016 / Part 3 / IEC 61260-3:2016 — Electroacoustics — Octave-band and Fractional-octave-band Filters — Part 3: Periodic Tests. This nationally adopted standard (ANSI/ASA) provides procedures and requirements for periodic (routine) testing of octave-band and fractional-octave-band filters that were designed to meet the Class 1 or Class 2 specifications of IEC 61260‑1:2014. Its purpose is to ensure consistent, repeatable periodic verification across laboratories and calibration facilities.

Abstract

This part of IEC 61260 (adopted as ANSI/ASA S1.11-2016 Part 3) specifies methods and pass/fail criteria for periodic testing of analogue, sampled-data and digital octave‑band and fractional‑octave‑band filters. It defines required test signals, measurement procedures, acceptance tolerances and reporting details so that laboratories can verify filter performance remains within the limits originally specified for Class 1 or Class 2 instruments.

General information

• Status: Current — nationally adopted IEC standard (reaffirmed/released in ANSI/ASA form; updated record R2024).
• Publication date: IEC base publication: 23 March 2016; ANSI/ASA designation: S1.11‑2016 (Part 3). Reissued / R2024 (ASA) dated 20 December 2024.
• Publisher: Acoustical Society of America (ASA) / International Electrotechnical Commission (IEC) as IEC 61260‑3.
• ICS / categories: 17.140.50 — Electroacoustics (octave and fractional‑octave filters).
• Edition / version: IEC 61260‑3:2016 (Edition 1.0); ANSI/ASA S1.11‑2016 Part 3 (national adoption), with ASA record R2024.
• Number of pages: ASA/ANSI published PDF: approximately 29 pages (formatting varies by publisher); IEC base document: 46 pages.

Scope

This standard applies to the periodic verification (routine re‑checking) of octave‑band and fractional‑octave‑band filter sets and instruments intended to meet IEC 61260‑1 Class 1 or Class 2 specifications. It covers required test signals and stimuli, measurement arrangements, procedures for determining center frequency, bandwidth and filter shape characteristics, allowable deviations and tolerances, reporting requirements, and recommendations on test intervals and uncertainty considerations. It is intended for use by test laboratories, calibration facilities, manufacturers and anyone performing recurring checks of band‑pass filter performance.

Key topics and requirements

• Definitions and classification for octave and fractional‑octave filter sets (Class 1 and Class 2).
• Required periodic test signals, measurement setups and environmental conditions for routine verification.
• Procedures to measure center (mid‑band) frequency, nominal bandwidth, and relative attenuation shape.
• Acceptance tolerances and pass/fail limits for key filter parameters (frequency deviation, bandwidth deviation, out‑of‑band attenuation).
• Instructions for instrument calibration traceability and test equipment requirements (signal generation, level measurement, reference microphones or detectors where applicable).
• Guidance on test intervals, documenting results, and when to perform full pattern‑evaluation tests versus routine checks.
• Requirements for uncertainty evaluation and reporting of measurement results.
• Reporting format: required information to include in periodic test records (identification, test conditions, measured values, conformity statement).

Typical use and users

Used by acoustical calibration laboratories, manufacturers of audio and acoustic measurement instruments (spectrum analyzers, sound level meters, digital filter banks), in‑house metrology departments, national metrology institutes, and conformity assessment bodies. Typical activities include routine verification of filter performance during instrument maintenance, pre‑ and post‑shipment checks by manufacturers, acceptance testing after repair, and periodic laboratory quality control to maintain traceability and measurement confidence.

Related standards

Key related documents include IEC 61260‑1:2014 / ANSI/ASA S1.11 Part 1 (Specifications for octave and fractional‑octave filters), IEC 61260‑2:2016 / ANSI/ASA S1.11 Part 2 (Pattern‑evaluation tests), ISO/IEC 17025 (general requirements for testing and calibration laboratories), and other ASA/ANSI acoustics standards covering measurement microphones, sound level meters and weighting networks.

Keywords

octave‑band, fractional‑octave, band‑pass filters, periodic tests, IEC 61260, ANSI/ASA S1.11, Class 1, Class 2, electroacoustics, calibration, verification, filter bandwidth, center frequency, uncertainty, test procedures.

FAQ

Q: What is this standard?

A: It is the periodic‑test part of the IEC 61260 family, adopted in the U.S. as ANSI/ASA S1.11‑2016 Part 3; it defines routine verification procedures for octave and fractional‑octave filters.

Q: What does it cover?

A: It covers test signals, measurement setups, procedures for determining center frequency and bandwidth, tolerances and pass/fail criteria, reporting requirements, and recommendations on test intervals and uncertainty for periodic checks.

Q: Who typically uses it?

A: Calibration and test laboratories, instrument manufacturers, metrology departments, and conformity assessors who need to verify that filter sets or analyzers remain within Class 1 or Class 2 specifications.

Q: Is it current or superseded?

A: The original IEC publication date is 23 March 2016 (IEC 61260‑3:2016). The ANSI/ASA national adoption is S1.11‑2016 Part 3; the ASA record shows a reaffirmation/update (R2024) issued 20 December 2024, and the document is in current use.

Q: Is it part of a series?

A: Yes — it is Part 3 of the IEC 61260 / ANSI/ASA S1.11 series. Part 1 specifies filter performance requirements, Part 2 contains pattern‑evaluation tests, and Part 3 defines periodic test methods for ongoing verification.

Q: What are the key keywords?

A: Octave, fractional‑octave, band‑pass filter, periodic test, IEC 61260, ANSI/ASA S1.11, calibration, Class 1, Class 2, electroacoustics.