| Zugriffsnummer | 38846 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Metrology for infrasound measurements |
| Autor(in); Institution |
Kling, Christoph; 1.6, Schall, PTB-Braunschweig
Fedtke, Thomas; 1.6, Schall, PTB-Braunschweig
Soares, Zemar Defilippo Martins; National Institute of Metrology, Quality and Technology (INMETRO), Rio de Janeiro, BRAZIL
Milhomem, Thiago B.; National Institute of Metrology, Quality and Technology (INMETRO), Rio de Janeiro, BRAZIL
|
| Quelle/Jahr | 24th International Congress on Sound and Vibration (ICSV 24): 2 (2017), 1356 - 1359 |
| ISBN | 978-1-5108-4585-5 |
| Verlag | Red Hook, NY: Curran Associates, Inc |
| Konferenzangaben | 24th International Congress on Sound and Vibration (ICSV 24), London, 23-27, July, 2017, UK |
| Klassifikationscode | PACS: 43.28.Dm ; PACS: 43.38.KB ; PACS: 43.58.Vb |
| Freie Schlagworte | Infrasound ; metrology ; microphone ; calibration |
| Zusammenfassung | There are a growing number of sound measurements at infrasound frequencies, i.e. below the classical audio frequency range. Examples are the assessment of noise produced by wind turbines or by detonations in open pit mining. A major problem concerning these infrasound measurements is that the calibration of the measurement equipment is usually only traceable down to a frequency of 20 Hz. Due to these practical needs the frequency range for primary and secondary calibration methods is now being extended to the infrasound. With special care, pressure reciprocity calibration of laboratory standard microphones can give a primary reference down to 2 Hz and our newly developed secondary calibration method allows to calibrate microphones as well as sound level meters down to about 1 Hz. A bilateral comparison of secondary microphone calibration has been performed by PTB (Germany) and INMETRO (Brazil) to validate the new procedure. Combining both methods, a closed traceability chain becomes available for sound measurements in the infrasound frequency range. This enables us to provide both, working standards for calibration laboratories and direct calibration of end-user devices. |
