ANSI ASA S1.11-2014 part 1 (2023) PDF

Full title and description

ANSI/ASA S1.11-2014 / Part 1 — Electroacoustics: Octave-band and Fractional-octave-band Filters — Part 1: Specifications. This is the American adoption of IEC 61260-1:2014 and specifies performance requirements for analogue, sampled-data, and digital implementations of octave, half‑octave and third‑octave band‑pass filter sets used for acoustical measurements.

Abstract

This standard defines the design goals, acceptance limits, maximum‑permitted measurement uncertainties, and reference environmental conditions for octave and fractional‑octave band filters. It provides requirements for two filter classes (Class 1 and Class 2), and is intended to ensure reproducible, traceable filter performance in laboratory and field instruments such as sound level meters, analyzers and spectrum monitors.

General information

• Status: Active — American adoption of IEC 61260‑1:2014; reaffirmed (R2023).
• Publication date: IEC base publication 14 February 2014; adopted in the ANSI/ASA S1.11‑2014 / Part 1 edition.
• Publisher: Acoustical Society of America (ASA) as the content provider for the ANSI/ASA adoption; ANSI distributes through its webstore.
• ICS / categories: 17.140.50 (Electroacoustics / Filters and related instrumentation).
• Edition / version: ANSI/ASA S1.11‑2014 / Part 1 — identical adoption of IEC 61260‑1:2014; document history shows reaffirmation activity in 2023 (R2023).
• Number of pages: Varies by publisher/format — the IEC publication lists 88 pages (bilingual packaging), while several English/EN publisher listings of the identical national edition show ~46–48 pages (single language). Users should check the specific publisher PDF for the exact page count.

Scope

Specifies performance requirements, acceptance limits and maximum‑permitted measurement uncertainty for octave and fractional‑octave band filter sets used in acoustical instruments. The scope includes analog, sampled‑data and digital implementations, definition of Class 1 and Class 2 performance criteria, environmental reference conditions for testing, and the basis for verification and conformity testing. It is the Part 1 (specifications) component of the IEC 61260 series (with Parts 2 and 3 covering pattern evaluation tests and periodic tests).

Key topics and requirements

• Performance requirements for octave, half‑octave and third‑octave band filters (pass‑band shape, attenuation characteristics).
• Two filter performance classes (Class 1 and Class 2) with differing acceptance limits and operational temperature ranges.
• Maximum‑permitted expanded measurement uncertainties for verification of observed values.
• Reference environmental conditions for testing (temperature/humidity references) and measurement procedures.
• Traceability and conformity criteria for instruments containing filter sets (sound level meters, analyzers, spectrum monitors).
• Harmonization with IEC 61260 series (Parts 2 and 3) for pattern evaluation and periodic testing.

Typical use and users

Used by manufacturers of sound level meters, analyzers and spectrum analyzers, test laboratories performing filter verification, acoustical consultants, standards and compliance engineers, and regulatory bodies. It is commonly referenced in occupational noise and audiometry contexts where band‑filtered measurements or background noise limits are specified.

Related standards

IEC 61260 Parts 2 and 3 (pattern evaluation and periodic tests); ANSI/ASA S1.4 (Sound level meters / IEC 61672 series); ANSI/ASA S1.6 (preferred frequencies and center frequencies); ISO/GUM guidance on uncertainty of measurement — these documents are commonly used together to specify, test and verify filter performance and instrument conformance.

Keywords

octave‑band filters, fractional‑octave, band‑pass filters, electroacoustics, IEC 61260, filter specifications, Class 1, Class 2, measurement uncertainty, sound level meter, spectrum analyzer

FAQ

Q: What is this standard?

A: ANSI/ASA S1.11‑2014 Part 1 is the American adoption of IEC 61260‑1:2014 that defines specifications for octave and fractional‑octave band filters used in acoustical measurement instruments.

Q: What does it cover?

A: It covers design goals and performance requirements for analogue, sampled‑data and digital band‑pass filters (octave, half‑octave, third‑octave), acceptance limits, classes of performance (Class 1 / Class 2), and maximum permitted uncertainties and reference test conditions.

Q: Who typically uses it?

A: Manufacturers of acoustic instruments, test and calibration laboratories, acoustical consultants, regulatory and compliance personnel (including contexts referenced by occupational noise guidance), and research organizations.

Q: Is it current or superseded?

A: The IEC base document was published in February 2014 and the ANSI/ASA adoption is the 2014 / Part 1 edition; the adoption has recorded reaffirmation activity in 2023 (R2023), so it is treated as the current adopted specification. Users should verify whether any later amendments or a full revision have been published after 2023 before relying on the standard for new procurement or certification.

Q: Is it part of a series?

A: Yes — it is Part 1 (Specifications) of the IEC 61260 series; Parts 2 and 3 address pattern evaluation tests and periodic tests respectively and are used together for conformance and verification.

Q: What are the key keywords?

A: Octave‑band, fractional‑octave, band‑pass filter, electroacoustics, IEC 61260, Class 1, Class 2, measurement uncertainty, sound level meter.