关于齿轮噪声的外文资料<<ANALYSIS OF THE TIME STRUCTURE OF GEAR RATTLE>>
INTRODUCTION
The sound of a vehicle is composed of a variety of different components. Besides the major
contributors such as engine, wind and tire noises several other sources might contribute to the
overall audible sound, and thus influence the overall Sound Quality impression of the vehicle.
One of these specific noise components is gear rattle. This is a noise which is produced
by the gear, and which might be audible in specific driving conditions in the interior of the vehicle.
Once it is detected, this gear rattle can reduce the overall Sound Quality impression significantly,
or it can even be associated to a technical defect.
It has been shown in a previous paper [1] that spectral cues can be used to analyse and
quantify gear rattle for vehicles with a diesel engine. A new spectral metric has been developed
which allows to predict the rating of gear rattle from an artificial head recording of the interior
vehicle noise in a defined driving condition. But, a closer look to the characteristics of gear
rattle shows that besides spectral cues also the time structure of the sound carries perceptual relevant
information. In this paper a new method to analyse gear rattle and to predict the rating of
subjects will be presented which is based on an analysis of the time structure. |