In anechoic chambers, these standards ensure that the microphone you use to measure jet engine noise or EV motor whine is traceable back to international definitions.
Always search for the "CSV" (Consolidated Version) to ensure the PDF includes Amendment 1 integrated into the text, rather than having to read corrections separately. iec 61094-4 pdf
and reliable for sound pressure determinations. While Part 1 of the series focuses on "Laboratory Standards" (LS) used for primary calibrations, Part 4 focuses on the microphones used daily in industrial and laboratory settings for routine testing. International Journal of Metrology and Quality Engineering Key Specifications Mechanical Dimensions In anechoic chambers, these standards ensure that the