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분야 | TC 29 : Electroacoustics |
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적용범위 | IEC 60942:2017 is also available as IEC 60942:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60942:2017 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. This fourth edition cancels and replaces the third edition published in 2003, of which it constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) deletion of the class designations, class LS/C, class 1/C and class 2/C; b) addition of two further class designations, class LS/M and class 1/M, specifically for pistonphones; c) addition of an amended criterion for assessing conformance to a specification: conformance is now demonstrated when (a) measured deviations from design goals do not exceed the applicable acceptance limits and (b) the uncertainty of measurement does not exceed the corresponding maximum-permitted uncertainty; d) modification to the short-term level fluctuation test of the sound pressure level stability; e) change to some environmental test conditions to avoid icing; f) addition of an alternative test for immunity to radio-frequency fields using transverse electromagnetic (TEM) waveguides. |
국제분류(ICS)코드 |
33.100.20 : 내성
17.140.50 : 전자 음향 |
페이지수 | 112 |
Edition | 4.0 |
No. | 표준번호 | 표준명 | 발행일 | 상태 |
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1 | IEC 60942:2017 | Electroacoustics - Sound calibrators | 2017-11-29 | 표준 |
2 | IEC 60942:2017 RLV | Electroacoustics - Sound calibrators | 2017-11-29 | 표준 |
3 | IEC 60942:2003 | Electroacoustics - Sound calibrators | 2003-01-30 | 구판 |
4 | IEC 60942:1997/AMD1:2000 | Amendment 1 - Electroacoustics - Sound calibrators | 2000-10-09 | 구판 |
5 | IEC 60942:1997 | Electroacoustics - Sound calibrators | 1997-11-18 | 구판 |
6 | IEC 60942:1988 | Sound calibrators | 1988-09-22 | 구판 |
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