ISO 2923-1996 PDF

Full title and description

Acoustics — Measurement of noise on board vessels. This International Standard specifies techniques and conditions for the measurement of airborne noise on board ships and other vessels to allow comparison between vessels, support acceptance and monitoring tests, provide a basis for further investigations and help assess the audibility of acoustical alarms.

Abstract

Describes procedures, measurement conditions and practical guidance for obtaining reproducible noise measurements aboard vessels. The results are intended for comparisons between vessels, compliance and acceptance testing, monitoring and studies of alarm audibility. This edition was published in 1996 and has a technical corrigendum issued in 1997.

General information

• Status: Published — current (last reviewed and confirmed in 2022).
• Publication date: 1996-12 (Edition 2, published December 1996).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.140.30 (Noise emitted by means of transport); 47.020.01 (General standards related to shipbuilding and marine structures).
• Edition / version: Edition 2 (1996); amended by Technical Corrigendum 1:1997.
• Number of pages: 7 pages (main text).

Scope

ISO 2923:1996 specifies methods for measuring airborne noise on board vessels under defined conditions so that results can be compared between vessels and used in acceptance, regulatory and monitoring contexts. It defines measurement techniques and conditions intended to produce reproducible results and to support assessment of the audibility of alarm signals on board.

Key topics and requirements

• Defined measurement techniques and positions on board to obtain representative onboard noise levels.
• Specification of measurement conditions and environmental considerations to ensure reproducibility.
• Guidance on instrumentation, calibration and data recording needed for reliable on-board noise measurements.
• Application of results for comparisons between vessels, acceptance testing, monitoring and audibility assessments.
• Incorporation of a technical corrigendum issued in 1997 addressing editorial/technical corrections.

Typical use and users

Used by maritime classification societies, shipbuilders and shipyards, naval architects, marine engineers, acoustic consultants, port and flag-state authorities, and researchers conducting shipboard noise surveys, acceptance tests or alarm audibility studies. Practitioners use the standard to ensure comparable and reproducible onboard noise measurements for design, regulatory compliance and operational monitoring.

Related standards

Relevant related documents include the withdrawn ISO 2923:1975 (revised by this 1996 edition) and the technical corrigendum ISO 2923/COR1:1997. For broader acoustic measurement practice and terminology, users often consult other ISO acoustics standards (for example standards on sound power and environmental noise measurement) alongside national maritime measurement regulations.

Keywords

acoustics; shipboard noise; marine noise measurement; onboard noise; audibility; noise monitoring; measurement procedures; maritime acoustics; instrument calibration.

FAQ

Q: What is this standard?

A: ISO 2923:1996 is an International Standard titled "Acoustics — Measurement of noise on board vessels" that specifies methods and conditions for measuring airborne noise on ships and similar vessels.

Q: What does it cover?

A: It covers measurement techniques, required conditions and practical guidance to obtain reproducible onboard noise measurements for comparisons, acceptance tests, monitoring and assessment of alarm audibility.

Q: Who typically uses it?

A: Maritime engineers, shipbuilders, classification societies, acoustic consultants, regulators and researchers performing shipboard noise surveys and acceptance or monitoring tests.

Q: Is it current or superseded?

A: The 1996 edition (Edition 2) remains the published version and was reviewed and confirmed in 2022; it is therefore current. A technical corrigendum was issued in 1997.

Q: Is it part of a series?

A: It is a stand‑alone ISO acoustics standard focused on vessel noise measurement; it replaces the earlier ISO 2923:1975 edition and complements other ISO acoustics standards addressing sound power, environmental noise and measurement methods.

Q: What are the key keywords?

A: Acoustics; shipboard noise; measurement; onboard noise; audibility; noise monitoring; instrument calibration.