IEC 60942:2017-Electroacoustics - Sound calibrators (Record no. 16223)
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| 000 -LEADER | |
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| fixed length control field | 02554nam a22001337a 4500 |
| 245 ## - TITLE STATEMENT | |
| Title | IEC 60942:2017-Electroacoustics - Sound calibrators |
| 250 ## - EDITION STATEMENT | |
| Edition statement | 4.0 |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication | Geneva : |
| Name of publisher | International Electrotechnical Commission, |
| Year of publication | 2017. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Number of Pages | 112 p. |
| 505 ## - FORMATTED CONTENTS NOTE | |
| Formatted contents note | 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.<br/><br/>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:<br/>a) deletion of the class designations, class LS/C, class 1/C and class 2/C;<br/>b) addition of two further class designations, class LS/M and class 1/M, specifically for pistonphones;<br/>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;<br/>d) modification to the short-term level fluctuation test of the sound pressure level stability;<br/>e) change to some environmental test conditions to avoid icing;<br/>f) addition of an alternative test for immunity to radio-frequency fields using transverse electromagnetic (TEM) waveguides. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Electroacoustics |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Sound calibrators |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Standards |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Date acquired | Total Checkouts | Accession Number | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|
| All India Institute of Speech and Hearing | All India Institute of Speech and Hearing | 22/06/2020 | ST009 | 22/06/2020 | 22/06/2020 | Standards |