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Exterior Noise Contribution Analysis with Simulated Indoor Pass-By Measurement
Technical Paper
2008-08-0224
Sector:
Event:
JSAE Spring Meeting
Language:
English
Abstract
The simulated indoor pass-by noise measurement system is the
measurement tool to evaluate the pass-by noise at the test
laboratory, without doing measurement at the field. This
measurement system can overcome the limitations of the field
measurement, i.e., weather conditions, reproducibility.
In this measurement, microphone array is located around the car
on chassis dyno. The measured time-domain signals are synchronized
with one signal, which is equivalent to the signal recorded in the
field representing the moving source effect. By using FRF between
indicator and receiver microphones, which are representing source
strength and evaluation points correspondingly, source path
contribution analysis is performed at 7.5 m apart from the
centerline of car.
In this paper, the measurement and signal process on top of the
theoretical background would be discussed with the measurement
example.