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IEC 60268-4:2018 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer. It applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use. It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output. For the purposes of this International Standard, a microphone includes all such devices as transformers, pre-amplifiers, or other elements that form an integral part of the microphone, up to the output terminals specified by the manufacturer. The major characteristics of a microphone are considered in Clauses 6 to 21. Additional characteristics are considered in Annex A and Annex C. IEC 60268-4:2018 cancels and replaces the fifth edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) subclause 19.4 on pop measurement replaces Annex C; b) new Annex D for noise measurements in the digital domain.
Determine the subscription format that is right for you.
Select the subscription format that is right for you. Table with 13 rows and 3 columns, identifies features available and not available for the two different subscription formats - CSA Advantage TM and CSA OnDemand TM
Includes all supported languages and archive versions
CSA AdvantageTM. feature not available. Includes all supported languages and archive versions
CSA OnDemandTM. feature available. Includes all supported languages and archive versions
My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
CSA AdvantageTM. feature available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
CSA OnDemandTM. feature not available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
Toggle between your files and the full standard to maintain context
CSA AdvantageTM. feature available. Toggle between your files and the full standard to maintain context
CSA OnDemandTM. feature not available. Toggle between your files and the full standard to maintain context
Instantly preview cross referenced material within the book
CSA AdvantageTM. feature available. Instantly preview cross referenced material within the book
CSA OnDemandTM. feature not available. Instantly preview cross referenced material within the book
Export personal notes to Excel
CSA AdvantageTM. feature available. Export personal notes to Excel
CSA OnDemandTM. feature not available. Export personal notes to Excel
Transfer notes and highlights when updates are available
CSA AdvantageTM. feature available. Transfer notes and highlights when updates are available
CSA OnDemandTM. feature not available. Transfer notes and highlights when updates are available
Adobe Reader PDF and browser compatible for iOS and Android
CSA AdvantageTM. feature not available. Adobe Reader PDF and browser compatible for iOS and Android
CSA OnDemandTM. feature available. Adobe Reader PDF and browser compatible for iOS and Android