| Autor: |
Christian Hof, Maria Enge, Salvador Barrera-Figueroa |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
19th International Congress of Metrology (CIM2019). |
| DOI: |
10.1051/metrology/201927005 |
| Popis: |
The microphone calibration by the reciprocity technique specified in IEC 61094-2 is used to determine the sensitivity of laboratory standard microphones according to the IEC 61094-1 with the smallest measurement uncertainty for the use as reference microphones. So far, laboratory standard microphones by the manufacturer Brüel & Kjær (Type 4160 and Type 4180) are almost exclusively used as laboratory reference microphones. In order to create an alternative, the initiative has been taken to examine the usability of the ½-inch laboratory microphones G.R.A.S. 40AU-1. Studies were launched to check the microphone parameters, the stability and the reciprocity of the microphones as well as the compatibility with microphones by Brüel & Kjær. Basis for the investigation was a new validated reciprocity calibration system. The realization of the system and the research results are presented and discussed. Additionally, results of comparison measurements with national metrology institutes are shown in shortened fashion. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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