| Zugriffsnummer | 30104 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Revision of ISO 717: Why not use impact sound reduction indices instead of impact sound pressure levels? Part 2: Application to different impact sources |
| Autor(in); Institution |
Scholl, Werner; 1.7, Akustik und Dynamik, PTB-Braunschweig
Ciszewski, Radoslav; Instytut Techniki Budowlanei (ITB), Warszawa, POLAND
Wittstock, Volker; 1.7, Akustik und Dynamik, PTB-Braunschweig
|
| Quelle/Jahr | Acta Acustica united with Acustica: 99 (2013), 917 - 930 |
| ISSN | 1610-1928 |
| DOI | |
| Verlag | Stuttgart: Hirzel |
| Klassifikationscode | PACS: 43.40.Kd ; PACS: 43.50.Jh ; PACS: 43.50.Pn ; PACS: 43.55.Rg ; PACS: 43.55.Ti |
| Freie Schlagworte | impact sound ; normalised impact sound pressure level ; impact sound reduction index ; characteristic source power ; source mobility ; source impedance ; ISO tapping machine ; modified tapping machine ; walking noise ; ISO 717 ; ISO 16717 ; ISO 10140 |
| Zusammenfassung | The standard series ISO 717 "Acoustics - Rating of sound insulation in buildings and of building elements" establish rules, how to evaluate one single characteristic number (so-called 'single-number quantities') for sound insulation from corresponding frequency spectra in third-octave or octave bands. At present, airborne sound insulation is expressed in terms of sound reduction indices, i.e. as ratios of incoming to transmitted sound power for a particular building element or situation, whereas impact sound is expressed in terms of sound pressure levels, based strictly on standard tapping machine excitation, which makes it - among other drawbacks - difficult to draw conclusions for other, more wide-spread impact sources. In the preceding paper [1], it was proposed to use sound reduction indices for impact noise, too. Hence, several questions arise: What would the "incoming sound power" be in this case? Is it necessary to have a separate impact sound reduction index for each kind of impact source? Could they be converted into each other by simple "correction terms"? How shall corresponding single-number quantities be defined? Answers are given in the present paper and discussed in more detail by means of the cases of the ISO standard tapping machine and walking persons. In any case, impact sound reduction conversion calculations from one source to another should take the source and receiver mobilities into account, or they may lead to wrong results. [1] W. Scholl, J. Lang, V. Wittstock: Rating of sound insulation at present and in future - the revision of ISO 717. Acta Acustica united with Acustica 97 (2011) 686-698 |
Zitierung
Scholl, W., Ciszewski, R., & Wittstock, V. (2013). Revision of ISO 717: Why not use impact sound reduction indices instead of impact sound pressure levels? Part 2: Application to different impact sources. Acta Acustica united with Acustica, 99, 917–930. https://doi.org/10.3813/aaa.918671