Session 1 - Acoustic array measurements for aeroacoustics in automotive

Gianmarco Battista

Università Politecnica delle Marche, Italy


Abstract

Automotive industry is always focused on the acoustic comfort of its products, ranging from utility vehicles to GT and Sport cars. On one hand, Internal Combustion Engine (ICE), are getting increasingly quieter, on the other hand, new challenges are rising with the diffusion of Electric Vehicles (EV). Moreover, the continuous improvement of internal noise in vehicle cabins requires more and more powerful techniques to reach target performance and improve the quality perceived by customers.

Single microphone measurements can only provide information about overall level or spectral content of the noise. Instead, acoustic source mapping with microphone array-based techniques can accomplish source localization, separation of contributions and quick troubleshooting. Given the huge number of techniques, variants and possible classifications, it could be tricky for a newbie user to pick up the best method for a particular application. The knowledge of the basic concepts about different array designs and acoustic mapping techniques enables the user to choose the best combination for each use case.

A general overview of acoustic mapping methods will clear up the ideas about pros and cons of beamforming algorithms, deconvolution techniques and inverse methods. Also, general guidelines about the choice of suitable microphone array layout will be provided. Practical examples will show the whole source mapping process and the effect of the most influencing parameters in the application of these powerful measurement techniques.


TECHNICAL SPONSOR


IEEE Instrumentation and Measurement Society
Italy Section
Italy Section SYSC Chapter
Italy Section PE Chapter
Italy Section IM Chapter
Italy Section EMB Chapter
Italy Section SEN Chapter


FINANCIAL SPONSOR


CeR ITC


With the Patronage of


University of  Emilia-Romagna
Università di Bologna
Unimore
Università degli studi di Parma
Università degli studi di Ferrara
unisannio
inrim
gmee
gmmt
ati
aimsea


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