A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Case studies on auralization of transfer paths
A key component of transfer path analysis and auralization in product sound design is the subdivision of the problem into the emission from primary sources and sound and vibration transmission and radiation. This contribution focuses on general aspects of the source and transfer path coupling and on artifacts caused by TPA (Transfer Path Analysis) measurements. Experimental and theoretical approaches are discussed which allow the impedance match of sources and transmission systems studied and used for auralization models. Examples from structure-borne sound in household appliances and building acoustics are shown where various aspects of TPA come into play such as impedance mismatch and distortion caused by measurement signals. The auralization approach for household appliances needs further research and improved measurements as the already low sound levels do not allow high measurement uncertainties of the input data. The radiation of the already highly engineered appliances can only be reduced by a few dB. Therefore the prediction by TPS (Transfer Path Synthesis) requires high accuracy which is currently still problematic. Measurements of TP and IR require careful signal processing with regard to background noise and non-linearities. Methods for extracting those effects known as windowing may introduce artefacts. Detailed analysis and optimized filtering improve the measurement results and extends the frequency range of useful results significantly.
Case studies on auralization of transfer paths
A key component of transfer path analysis and auralization in product sound design is the subdivision of the problem into the emission from primary sources and sound and vibration transmission and radiation. This contribution focuses on general aspects of the source and transfer path coupling and on artifacts caused by TPA (Transfer Path Analysis) measurements. Experimental and theoretical approaches are discussed which allow the impedance match of sources and transmission systems studied and used for auralization models. Examples from structure-borne sound in household appliances and building acoustics are shown where various aspects of TPA come into play such as impedance mismatch and distortion caused by measurement signals. The auralization approach for household appliances needs further research and improved measurements as the already low sound levels do not allow high measurement uncertainties of the input data. The radiation of the already highly engineered appliances can only be reduced by a few dB. Therefore the prediction by TPS (Transfer Path Synthesis) requires high accuracy which is currently still problematic. Measurements of TP and IR require careful signal processing with regard to background noise and non-linearities. Methods for extracting those effects known as windowing may introduce artefacts. Detailed analysis and optimized filtering improve the measurement results and extends the frequency range of useful results significantly.
Case studies on auralization of transfer paths
Fallstudien zur Auralisation von Übertragungswegen
Vorländer, Michael (author)
2009
6 Seiten, 4 Bilder, 4 Quellen
Conference paper
English
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