Specification for measurement microphones - Specifications for working standard microphones1 Scope and object This part of IEC 1094 is applicable to working standard microphones. It specifies mechanical dimensions and certain electroacoustical characteristics for working standard microphones used in measuring systems for the determination of sound pressure to enable these microphones to be used as transfer standards in the calibration of acoustic measurement instruments. It establishes a system for classifying working standard microphones

They are created in a committee by agreed expert opinion with experience of fire resistance testing and interpolation of test results

It takes account of IMO resolution A

IEC 60364-3:1993

disadvantages and limitations of use where these are known

It addresses and reviews the potential applications of high-power optical amplifiers and informative IEC documents related to high optical power for the better handling of high optical power

as well as requirements for its measurement

Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures

BS EN ISO 11611 is only applicable to hoods and gaiters

The assumptions on which the tables are based are given in each case

Who is ISO 7027‑2 - Water transparency assessment for

to provide specific requirements for post weld heat treatment when required by BS EN 729 2 or BS EN 729-3

BS 5528 helps you to ensure that operators are able to work efficiently and avoid injuries related to improper placement of controls