Noise barriers intrinsic characteristics evaluation is fairly complicated if one aims at simulating barrier operating conditions. One of the most successful methods consists of in situ impulse response measurement, in particular by means of MLS signals combined with cross-correlation techniques. This has been adopted by a new CEN Technical Specification. Anyway, such a method has shown limitations and drawbacks. The aim of the research is first of all to investigate the influence of various parameters, such as source characteristics, measurement apparatus geometry and signal processing technique, on the final results of the measurements. Correlation has been found between errors due to subtraction technique, used to isolate the reflected component, and differences observed in subsequent measures. Particular attention is also paid to barrier materials and shape; reflection coefficient measurements on low- as well as on high-absorptive barriers were performed. Finally, method repeatability and reproducibility were taken into account.

Asdrubali, F., G., P., G., B. (2004). Optimization of in situ noise barrier intrinsic characteristics measurements. In 11th International Congress on Sound and Vibration, St Petersburg, Russia, (pp.1473-1480).

Optimization of in situ noise barrier intrinsic characteristics measurements

ASDRUBALI, Francesco;
2004-01-01

Abstract

Noise barriers intrinsic characteristics evaluation is fairly complicated if one aims at simulating barrier operating conditions. One of the most successful methods consists of in situ impulse response measurement, in particular by means of MLS signals combined with cross-correlation techniques. This has been adopted by a new CEN Technical Specification. Anyway, such a method has shown limitations and drawbacks. The aim of the research is first of all to investigate the influence of various parameters, such as source characteristics, measurement apparatus geometry and signal processing technique, on the final results of the measurements. Correlation has been found between errors due to subtraction technique, used to isolate the reflected component, and differences observed in subsequent measures. Particular attention is also paid to barrier materials and shape; reflection coefficient measurements on low- as well as on high-absorptive barriers were performed. Finally, method repeatability and reproducibility were taken into account.
2004
9785732508161
Asdrubali, F., G., P., G., B. (2004). Optimization of in situ noise barrier intrinsic characteristics measurements. In 11th International Congress on Sound and Vibration, St Petersburg, Russia, (pp.1473-1480).
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/181905
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact