Objective of Subjective Acoustic Phenomena

Authors

Prof. Dr. U. Bernhard, Adam Opel AG, Rüsselsheim; Dr. N. Alt, FEV Motorentechnik GmbH, Aachen

Year

2005

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 595

Summary

Engines and accessories very often show unpleasant, disturbing singular noise components that can destroy a positive perception of a customer like "silent, pleasant and har-monic sound". A first important step to remove such disturbing noise phenomena is a common, definite and standardized linguistic usage and a catalogue of these phenomena using sound families join subjective criterions and objective values. For this, the FVV results out of the project "Beurteilung und Katalogisierung von Störgeräuschen bei Verbrennungsmotoren" are a good base. The next step is to calculate subjective perceptual burdensomeness based on measured or calculate time signals. If one succeeds, one can evaluate the disturbing noise in an early phase of the engine development and with this, one can correct design, material a.s.o. In a common project of Opel and FEV a characteristic noise of modern combustion engines was subjectively evaluated and a mathematic description was derived to meet the evaluation results. Using a second type of noise of the same sound family the result was verified. Thus, it was proven that objectivity of subjective acoustic phenomena works well.

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