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Expert decision support system for aeroacoustic source type identification using clustering.

A Goudarzi1, C Spehr1, S Herbold2

  • 1German Aerospace Center (DLR), Germany.

The Journal of the Acoustical Society of America
|March 2, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces an expert decision support system to identify aeroacoustic source types using acoustic properties and clustering. The system aids experts in distinguishing similar or atypical source behaviors efficiently.

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Area of Science:

  • Acoustics
  • Aerodynamics
  • Data Science

Background:

  • Aeroacoustic source identification is crucial for noise reduction.
  • Current methods may lack efficiency in distinguishing diverse source types.
  • A need exists for a system that aids expert analysis of aeroacoustic data.

Purpose of the Study:

  • To develop an Expert Decision Support System (EDSS) for identifying time-invariant aeroacoustic source types.
  • To provide a method for experts to quickly identify and understand aeroacoustic source behaviors.
  • To enable the differentiation of similar or atypical aeroacoustic source characteristics.

Main Methods:

  • A two-step approach: 1. Calculation of acoustic properties from spectral and spatial data. 2. Clustering based on these properties.
  • Development of novel features representing interpretable aeroacoustic properties.
  • Features are independent of absolute Mach number, allowing cross-flow configuration analysis.

Main Results:

  • The EDSS successfully clustered deconvolved beamforming data from airframe models.
  • Clustered sources largely corresponded to expert-identified types.
  • The system provides mean feature values, cluster hierarchy, and clustering confidence for transparency.

Conclusions:

  • The proposed EDSS effectively supports expert identification of aeroacoustic source types.
  • The system enhances understanding of source behavior and differences.
  • The method offers transparent and interpretable clustering results for expert decision-making.