Psychoacoustic Evaluation of Combustion Engine Noise

ATZ worldwide ◽  
2021 ◽  
Vol 124 (1) ◽  
pp. 56-59
Author(s):  
Sebastian Schneider ◽  
Florian Doleschal ◽  
Hermann Rottengruber ◽  
Jesko Verhey
Keyword(s):  
Combustion Engine ◽  
Engine Noise

Internal combustion engine noise reduction plate

1989 ◽  
Vol 85 (4) ◽  
pp. 1809-1809
Author(s):  
Benny Ballheimer ◽  
Michael K. Stratton
Keyword(s):  
Internal Combustion Engine ◽  
Noise Reduction ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Noise

Internal Combustion Engine Noise Analysis With Time-Frequency Distribution

2002 ◽  
Vol 124 (3) ◽  
pp. 645-649 ◽  
Author(s):  
G. T. Zheng ◽  
A. Y. T. Leung
Keyword(s):  
Internal Combustion Engine ◽  
Frequency Distribution ◽  
Frequency Analysis ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Noise Signal ◽  
Engine Noise ◽  
Noise Sources ◽  
Time Frequency ◽  
Time Frequency Distribution

An analysis procedure, using the time-frequency distribution, has been developed for the analysis of internal combustion engine noise signals. It provides an approach making use of advantages of both the linear time-frequency distribution and the bilinear time-frequency distribution but avoiding their disadvantages. In order to identify requirements on the time-frequency analysis and also correlate a time-frequency analysis result with noise sources, the composition of the noise signal is discussed first. With this discussion, a mathematical model has been suggested for the noise signal. An example of identifying noise sources and detecting the abnormal condition of an injector with the noise signal time-frequency distribution for a diesel engine is also provided.

scholarly journals Psychoacoustic evaluation of internal combustion engine noises

2021 ◽  
Author(s):  
Sebastian Schneider ◽  
Tommy Luft ◽  
Hermann Rottengruber
Keyword(s):  
Internal Combustion Engine ◽  
Empirical Formula ◽  
Combustion Engine ◽  
Sound Quality ◽  
Hearing Tests ◽  
Engine Noise ◽  
Vehicle Development ◽  
Noise Evaluation ◽  
Engine Map

AbstractWhen buying a car, the acoustic impression of quality of a vehicle drive train is becoming more and more relevant. The perceived sound quality of the engine unit plays a key role here. Due to the nature of individual background noises, that sound quality is negatively influenced. These noise components, which are perceived as unpleasant, need to be further reduced in the course of vehicle development with the identification and evaluation of disruptive noise components in the overall engine noise being a prerequisite for effective acoustics optimization. In particular, the pulsed ticker noise is classified as particularly annoying in Otto DI engines, which is why this article aims to analyze and evaluate the ticking noise components from the overall noise. For this purpose, an empirical formula was developed which can classify the ticking noise components in terms of their intensity. This is purely perception-based and consists of the impulsiveness, the loudness and the sharpness of the overall engine noise. As with other psychoacoustic evaluation scales, the rating was made from 1 (very ticking) to 10 (not ticking). The ticker noise evaluation formula was then verified on the basis of hearing tests with the help of a jury of experts. According to this, it can be predicted precisely in which engine map areas the ticker noise undermines the pleasantness of the overall engine noise.

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