| Publication CODE |
Title |
| IEC 60942:2017 (2017-11) |
ELECTROACOUSTICS - SOUND CALIBRATORS |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
318.00 €
|
112. |
Description
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.
|
| Class |
C990
(IEC PUBLICATIONS IEC PUBLICATIONS)
|
| Status |
IEC PUBLICATION |
| Situation |
Currently active
Replaces
IEC 60942:2003
|
|
| BEC Approval |
2017-11-29 |
| ICS-Code (International Standards Classification) |
17.140.50
, 33.100.20
|
| NBN Status |
New |
|
| IEC publication date |
2017-11-29 |
| IEC stability date |
2022-12-31 |
| IEC file modification date |
2017-11-29 |
| IEC last modification date |
2019-02-27 |
|
