| Autor: |
Kasess, Christian H., Maly, Thomas, Kirisits, Christian, Majdak, Piotr, Waubke, Holger |
| Předmět: |
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| Zdroj: |
INTER-NOISE & NOISE-CON Congress & Conference Proceedings; 2023, Vol. 265 Issue 3, p155-162, 8p |
| Abstrakt: |
Trains passing through a curve frequently produce the so-called curve squeal, which comprises salient noise components (typically either tonal or transient) covering a wide frequency range. Although the main underlying acoustical mechanisms are known, due to the large variety of curve squeal characteristics, their effects on acoustic parameters and in particular on the perception are difficult to quantify. The work aims at investigating the effects of acoustically described curve squeals on the perceived annoyance, tested in the laboratory with 30 listeners. Passby measurements in three narrow curves at distances of 7.5, 25, and 50m were obtained. By means of so-called frame multipliers, time-variable salient features were manipulated and combined with a number of clean rolling noise samples to simulate squeals with parameters obtained from existing emission measurements. As a result, annoyance ratings showed that the perception of curve squeal can be considerably altered compared to that of regular passby noise. A model was developed for the annoyance equivalent level adjustment from a clean rolling noise based on the contrast of high and mid-frequency energy. The model predictions can serve as basis to establish rating levels predicting the perceived annoyance of railway curve squeal. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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