Aeroacoustic Optimization

Our Commitments


Shorter analysis time


Isolated sources


Advanced noise removal algorithms


Optimized array geometry

The best way to identify and locate noise sources in complex and costly environments

Array techniques offer undeniable advantages for analyses both in ducts and in open or closed wind tunnels, where measurements are complex and costly. They enable the acoustic field to be captured as effectively as possible, measurements to be denoised, noise sources to be located, and transfer phenomena to be interpreted by coupling indoor and outdoor array measurements.

In partnership with research laboratories (LMFA, LVA), MicrodB has developed several methodologies to address different issues.

Duct Analysis

Reducing rotating machine noise  by optimizing acoustic treatment in the duct requires in-depth knowledge of the acoustic field in the duct. For this purpose, a measurement flush with the duct enables an advanced modal decomposition method. MicrodB  developed such a tool to facilitate the definition of the measurement configuration and associated treatments.

Rotating Equipment

Acoustic diagnosis of rotating machines such as fans, blowers or air-conditioning systems involves identifying and separating fixed and rotating sources. MicrodB’s tools offer de-dopplerization processing to separate leading and trailing edge sources or fixed or moving sources.

Transfer Analysis

Processing can use coherence-type referencing methods or coupling to interior arrays to better assess acoustic transfers between exterior and interior (identification of component weaknesses such as gaskets).

Wind Tunnel Analysis

For wind-tunnel analysis, the use of external array(s) outside the flow or in the wall makes it possible to identify and prioritize sources . For example, for a vehicle in an open wind tunnel, the resolution can be used to separate the rear-view mirror, windshield wiper, window pillar and wheel. For an aircraft model in a closed wind tunnel, the advantage is to separate wing noise from leading and trailing edges, flaps, landing gear, etc.

Aeroacoustic Optimization

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