Norm

NEN-EN-IEC 60942:2018 en

Elektro-akoestiek - IJkbronnen voor geluid

244,54 295,89 Incl BTW

Over deze norm

Status Definitief
Aantal pagina's 112
Commissie Elektro-akoestiek en ultrageluid
Gepubliceerd op 01-03-2018
Taal Engels
NEN-EN-IEC 60942 specifies the performance requirements for three classes of sound calibrator: class LS (Laboratory Standard), class 1 and class 2. Acceptance limits are smallest for class LS and greatest for class 2 instruments. Class LS sound calibrators are normally used only in the laboratory; class 1 and class 2 are considered as sound calibrators for field use. A class 1 sound calibrator is primarily intended for use with a class 1 sound level meter and a class 2 sound calibrator primarily with a class 2 sound level meter, as specified in IEC 61672-1. The acceptance limits for class LS sound calibrators are based on the use of a laboratory standard microphone, as specified in IEC 61094-1, for demonstrations of conformance to the requirements of this document. The acceptance limits for class 1 and class 2 sound calibrators are based on the use of a working standard microphone, as specified in IEC 61094-4, for demonstrations of conformance to the requirements of this document. To promote consistency of testing of sound calibrators and ease of use, this document contains three normative annexes - Annex A "Pattern evaluation tests", Annex B "Periodic tests", Annex C "Pattern evaluation report", and two informative Annexes - Annex D "Relationship between tolerance interval, corresponding acceptance interval and the maximum-permitted uncertainty of measurement" and Annex E "Example assessments of conformance to specifications of this document". This document does not include requirements for equivalent free-field or random-incidence sound pressure levels, such as can be used in the overall sensitivity adjustment of a sound level meter. A sound calibrator can provide other functions, for example, tonebursts. Requirements for these other functions are not included in this document.

Details

ICS-code 17.140.50
33.100.20
Nederlandse titel Elektro-akoestiek - IJkbronnen voor geluid
Engelse titel Electroacoustics - Sound calibrators
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