| Zugriffsnummer | 35924 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Study on the influence of spectrum and directivity on the uncertainty of the sound power determined using the substitution method |
| Autor(in); Institution |
Völkel, Katharina; 1.7, Akustik und Dynamik, PTB-Braunschweig
Wittstock, Volker; 1.7, Akustik und Dynamik, PTB-Braunschweig
|
| Quelle/Jahr | Fortschritte der Akustik : DAGA 2016, Aachen, 42. Jahrestagung für Akustik:(2016), 1278 - 1281 |
| Availability | [DVD-ROM] ; file name: 000210.pdf |
| Herausgeber(in) |
Vorländer, Michael
|
| ISBN | 978-3-939296-10-2 |
| Verlag | Berlin: Deutsche Gesellschaft für Akustik, DEGA |
| Konferenzangaben | 42. Deutsche Jahrestagung für Akustik, Aachen, 14-17, März, 2016, Deutschland |
| Freie Schlagworte | sound power ; substitution method ; uncertainty |
| Zusammenfassung | This paper presents two investigations on uncertainties associated with the substitution method. The first dealt with numerical models describing devices under test that display directivity patterns which are different from the one that the reference sound source emits. Results show that the uncertainty of the calculated sound power decreases exponentially with an increase in measurement microphones used. The second investigation showed that is possible to calculate a correct sound power level for a device under test by applying the substitution method to A-levels. This does not hold for approximately free or diffuse fields, where sound powers have to be calculated by using the substitution methods on each one-third octave band with subsequent A-weighting. |
