| Zugriffsnummer | 27296 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Does it matter whether single-number values of sound reduction indices are evaluated from third-octave band values or from octave band values? |
| Autor(in); Institution |
Scholl, Werner; 1.7, Akustik und Dynamik, PTB-Braunschweig
Wittstock, Volker; 1.7, Akustik und Dynamik, PTB-Braunschweig
|
| Quelle/Jahr | Acta Acustica united with Acustica: 98 (2012), 2, 354 - 360 |
| ISSN | 1610-1928 (PRINT) ; 1861-9959 (ONLINE) |
| DOI | |
| Verlag | Stuttgart: Hirzel |
| Klassifikationscode | PACS: 43.55.-n ; PACS: 43.58.-e |
| Zusammenfassung | At present, sound insulation characteristics of buildings or building elements are described both in terms of octave band and third-octave band spectra. From these, so-called single-number quantities are derived as a means of simple evaluation of the spectra. On the occasion of the revision of ISO 717 - where the procedures of single-numbering are described - the question arose whether to keep both frequency resolutions, and, if yes, how to make them compatible. In this paper, the exact transition from third-octave band insulation values to the corresponding octave band values is investigated and compared with the practical measurement situation. Furthermore, the scatter of the resulting single-numbers caused by the specification of reference curves in terms of octave and third-octave band values, respectively, is demonstrated. Finally, a proposal from a new measurement standard is presented which could solve the problems of the two competing rating systems. |
