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| Due to the fact that high warranty costs may be caused
by the occurrence of brake noise like brake squeal (>1
kHz) and moan (<1 kHz) the noise performance plays a
significant role in the development process of brake
systems. |
Reproducing these typical annoying brake noise phenomena
is often extremely difficult since the noise occurrence
depends on a wide variety of ambient conditions. This
leads to test procedures that consume a lot of time
and are thus very expensive. However, with the  HEAD
BrakeOBSERVER test system and the HEAD
Noise Event Manager evaluation and documentation software,
HEAD Consult NVH is able to provide and use powerful
tools that can help to efficiently solve the described
test tasks. |
Both, the complete execution of the brake test procedure
for any customer vehicle as well as extensive support
for users of the
HEAD
BrakeOBSERVER test system in order to assist with |
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| brake
tests, can be provided as consulting services from our experienced
brake noise consulting team. |
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| During the test procedures the relevant sections of
the long term recordings that include typical annoying
brake noise patterns are identified and extracted using
an automatic detection algorithm based on a psychoacoustic
approach. |
| The fast feedback of the detection process allows optimizing
the test drives with respect to the annoying patterns.
At the end of the test drives, the results of all relevant
brake incidents may be summarized and classified using
the HEAD
Noise Event Manager; achieving a fast overview about
the acoustic quality of the investigated brake system
and the dependency of brake noise patterns on all measured
ambient conditions. |
| Also listening of the recordings and deeper analysis
of the results is easily possible. |
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Brake Noise Detection and Analysis
