IEC 61094-1-2000 PDF

Full title and description

St IEC 61094-1-2000 — Measurement microphones — Part 1: Specifications for laboratory standard microphones. Specifies mechanical dimensions and electroacoustic characteristics for condenser microphones intended to be used as laboratory standards for the realization of the unit of sound pressure and for the highest-accuracy sound pressure measurements; intended to ensure primary calibration by the reciprocity method and to provide a classification system for laboratory standard condenser microphones.

Abstract

IEC 61094-1:2000 (Edition 2.0) defines the mechanical, electrical and acoustic specifications required of laboratory standard condenser microphones so they can be used as transfer standards in primary reciprocity calibrations and high-accuracy measurements. The document establishes standard dimensions, terminal and ground‑shield configurations, and performance characteristics necessary to guarantee interchangeability and reproducible calibration results across laboratories.

General information

• Status: Published / active (IEC publication).
• Publication date: 21 July 2000 (Edition 2.0).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 17.140.50 — Electroacoustics.
• Edition / version: Edition 2.0 (2000).
• Number of pages: 27 pages (IEC webstore listing).

Summary information above is taken from the IEC publication record and standard catalogues.

Scope

This part of IEC 61094 specifies the physical dimensions and certain electroacoustic parameters of condenser microphones used as laboratory standards so that primary calibration by the reciprocity technique can be readily carried out. It also defines a system for classifying laboratory standard condenser microphones by type (mechanical dimensions and properties) to facilitate specification of calibration methods, interlaboratory comparisons and interchangeability in calibration systems.

Key topics and requirements

• Formal specifications of mechanical dimensions and mounting interfaces for laboratory standard condenser microphones to enable interchangeability and use in couplers and reciprocity rigs.
• Electroacoustic performance characteristics (pressure sensitivity, frequency-response constraints and allowable tolerances) required of laboratory standards.
• Requirements for electrical terminal arrangements, ground‑shield reference configurations and the insert‑voltage/open‑circuit voltage measurement techniques used during calibration.
• Guidance to support primary reciprocity calibration (links to methods and uncertainty considerations used in primary laboratory calibrations).
• Expression of quantities in SI units and provisions to ensure traceability and reproducible uncertainty evaluation for high‑accuracy sound pressure realization.

Technical requirements and measurement/connection details that support reciprocity and coupler calibrations are described in the IEC 61094 series and associated calibration-method parts.

Typical use and users

Laboratory standard microphones conforming to IEC 61094-1 are used by national metrology institutes, accredited acoustic calibration laboratories, manufacturers of reference microphones and sound level meter test laboratories. Typical activities include primary reciprocity calibration, interlaboratory comparisons, high‑accuracy sound pressure measurements, and the transfer of calibration from laboratory standards to working standards.

Related standards

IEC 61094-1 is part of the IEC 61094 series (measurement microphones). Closely related parts and documents include: IEC 61094-2 (primary reciprocity calibration method), IEC 61094-3, IEC 61094-4 (working standard microphones), IEC 61094-5 (comparison methods for working standards), and other IEC/ISO electroacoustics standards such as IEC 60268-4 and IEC 61672 (sound level meters). ISO/IEC Guide 98-3 (GUM) is commonly used for uncertainty expression in calibration work.

Keywords

measurement microphone; laboratory standard microphone; condenser microphone; reciprocity calibration; pressure sensitivity; electroacoustics; calibration; IEC 61094; reference microphone; ground‑shield configuration; insert voltage.

FAQ

Q: What is this standard?

A: IEC 61094-1:2000 specifies mechanical and electroacoustic requirements for laboratory standard condenser microphones used as reference instruments for high‑accuracy sound pressure measurement and primary calibration.

Q: What does it cover?

A: It covers physical dimensions, terminal and shielding arrangements, required electroacoustic parameters (e.g., pressure sensitivity characteristics), and classification rules that allow microphones to be used in primary reciprocity and coupler‑based calibration methods.

Q: Who typically uses it?

A: National metrology institutes, accredited calibration laboratories, microphone manufacturers, and laboratories performing high‑accuracy acoustic measurements and interlaboratory comparisons.

Q: Is it current or superseded?

A: IEC 61094-1:2000 is Edition 2.0 published in July 2000 and is the edition referenced in IEC catalogues; users should verify whether a newer edition or amendments exist for their jurisdiction or specific application, and consult national adoptions where applicable.

Q: Is it part of a series?

A: Yes — it is Part 1 of the IEC 61094 series (Measurement microphones). Other parts of the series cover primary calibration methods, working standard microphones, comparison calibration methods and related technical reports.

Q: What are the key keywords?

A: Measurement microphone, laboratory standard, reciprocity calibration, condenser microphone, pressure sensitivity, electroacoustics, calibration, IEC 61094.