ANSI ASA S1.11-2014 part 1 PDF

Full title and description

ANSI/ASA S1.11-2014/Part 1 / IEC 61260-1:2014 — Electroacoustics — Octave-band and Fractional-octave-band Filters — Part 1: Specifications. This American National Standard is a national adoption of IEC 61260-1:2014 and defines performance, environmental reference conditions, acceptance limits and measurement-uncertainty requirements for octave, half-octave and fractional-octave band-pass filter sets implemented in analogue, sampled‑data or digital form (e.g., filter sets and spectrum analyzers used in acoustical measurements).

Abstract

This standard specifies design goals and quantitative performance requirements for octave-band and fractional-octave-band filters used in acoustical and electroacoustic measurements. It defines two classes of filter performance (Class 1 and Class 2), criteria for pass‑band and stop‑band behaviour, permissible deviation/acceptance limits, maximum permitted expanded measurement uncertainties, required marking and documentation, and reference environmental conditions for testing and verification. The document is intended to ensure consistency and traceability of spectral band measurements across instruments and laboratories.

General information

• Status: ANSI/ASA national adoption of IEC 61260-1:2014 — ANSI approved; reaffirmed (R2019 and R2023) and maintained by the Acoustical Society of America.
• Publication date: July 2, 2014 (ANSI/ASA adoption); IEC base publication 2014 (early 2014).
• Publisher: Acoustical Society of America (ASA) / American National Standards Institute (ANSI) (national adoption of IEC publication).
• ICS / categories: 17.140.50 — Electroacoustics (Acoustics and acoustic measurements).
• Edition / version: 2014 edition (ANSI/ASA S1.11-2014/Part 1), nationally adopted from IEC 61260-1:2014; reaffirmation records include R2019 and R2023.
• Number of pages: Typical ASA PDF ~50 pages (ANSI/ASA published version); IEC original edition published as a bilingual document with longer pagination (commonly listed ~88 pages in IEC catalog).

Scope

The standard applies to octave, half-octave and fractional-octave band-pass filters implemented in analogue, sampled-data or digital form that are used as measurement filter sets or within spectrum analysers for acoustic and electroacoustic measurements. It covers performance requirements (frequency response, relative attenuation, pass‑band extent), environmental reference conditions for verification, distinction between Class 1 and Class 2 filters, maximum permitted measurement uncertainties, instrument marking and required user documentation. It does not prescribe specific hardware implementations but sets criteria instruments must meet to claim conformance.

Key topics and requirements

• Definitions of octave and fractional-octave band centre frequencies and bandwidth relationships based on base‑10 design goals.
• Performance classes (Class 1 and Class 2) with associated acceptance limits and differing operational temperature ranges.
• Quantitative pass‑band and stop‑band attenuation limits, relative attenuation characteristics and band number conventions.
• Maximum-permitted expanded measurement uncertainties for verification tests to ensure conformance.
• Reference environmental conditions (temperature, humidity) under which verification tests are specified.
• Requirements for instrument marking, labelling of filter sets and contents of the instruction manual.
• Guidance on measurement and acceptance procedures (pattern-evaluation and periodic tests are addressed in companion parts of the series).

Typical use and users

This standard is used by manufacturers of audio and acoustical measurement instruments (filter banks, spectrum analysers, sound level meters with band filters), calibration and test laboratories, regulatory bodies, research institutions and acoustical consultants. Typical applications include environmental noise measurements, occupational noise and hearing conservation testing, building and community acoustics, product noise testing, and laboratory verification/calibration of filter sets and analysers.

Related standards

Part of the IEC/ASA S1.11 series and closely associated documents include IEC 61260 parts 2 and 3 (pattern‑evaluation tests and periodic tests) / ANSI/ASA S1.11 Part 2 and Part 3; related American/IEC electroacoustics standards such as ANSI/ASA S1.4 (sound level meters / IEC 61672), ANSI/ASA S1.13 (measurement of sound pressure levels), and standards for microphones and calibration (IEC 61094 series). National regulations and guidance (for example OSHA characteristics for audiometric testing rooms) may reference S1.11 requirements for band filters used in verification and measurement.

Keywords

octave-band, fractional-octave, band-pass filter, IEC 61260-1, electroacoustics, filter specifications, Class 1, Class 2, measurement uncertainty, spectrum analyser, acoustic filters, instrument verification

FAQ

Q: What is this standard?

A: ANSI/ASA S1.11-2014/Part 1 is the American National Standard adoption of IEC 61260-1:2014 that sets specifications for octave and fractional-octave band-pass filters used in acoustical measurements.

Q: What does it cover?

A: It covers quantitative performance requirements for analogue, sampled-data and digital band-pass filters (octave and fractional-octave), defines two performance classes with acceptance limits, sets reference environmental conditions, and specifies marking and documentation requirements. Companion parts define pattern‑evaluation and periodic test methods.

Q: Who typically uses it?

A: Manufacturers of filter sets and spectrum analysers, calibration and acoustical test laboratories, acoustical consultants, research labs, and regulatory bodies that require traceable, reproducible band-filtered spectral measurements.

Q: Is it current or superseded?

A: The document is the 2014 edition adopted from IEC 61260-1:2014 and has recorded reaffirmations (for example R2019 and R2023). Users should check the ASA/ANSI catalog or the Acoustical Society of America for the most current reaffirmation or revision status before use.

Q: Is it part of a series?

A: Yes — S1.11/IEC 61260 is a multipart series: Part 1 covers specifications (this document), Part 2 covers pattern‑evaluation tests and Part 3 covers periodic tests. The series is intended to be used together for complete specification, testing and periodic verification of band-pass filters.

Q: What are the key keywords?

A: Octave-band, fractional-octave, band-pass filters, electroacoustics, IEC 61260-1, measurement uncertainty, Class 1, Class 2, spectrum analyser, filter verification.