Abstract
For the specification of the sound quality inside future high-speed trains, tonal components produced by the motors or corrugated rails can play an important role. Therefore, in psychoacoustic experiments, the dominance of tonal components at 630 or 1250 Hz was assessed. For an increase of the corresponding 1/3-oct band by 20 dB, a clear tonal character is audible which is only half as pronounced for an increase of 12.5 dB at 630 Hz or 10 dB at 1250 Hz. In line with the expectation, no tonal quality is perceived, if the 1/3-oct band in question is not enhanced. However, a decrease of sound energy in a 1/3-oct band by 20 dB can also produce a faint tonal sensation with a magnitude of about 1/10 of the tonal sensation produced by an increase of 20 dB. The results obtained with stimuli simulating the sound quality inside high-speed trains are in good agreement with data from basic psychoacoustic experiments. Therefore, it is expected that sound quality evaluation of high-speed trains indoor noise can profit from a multitude of psychoacoustic data available.
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