• DOI:10.2514/1.C033691
• Corpus ID: 113834930

Functional Beamforming Applied to Imaging of Flyover Noise on Landing Aircraft

@article{MerinoMartnez2016FunctionalBA,
  title={Functional Beamforming Applied to Imaging of Flyover Noise on Landing Aircraft},
  author={Roberto Merino-Mart{\'i}nez and Mirjam Snellen and Dick G. Simons},
  journal={Journal of Aircraft},
  year={2016},
  volume={53},
  pages={1830-1843}
}

• R. Merino-Martínez, M. Snellen, D. Simons
• Published 6 June 2016
• Engineering
• Journal of Aircraft

Functional beamforming is a state-of-the-art nonlinear algorithm based on the conventional frequency domain beamformer. In general, it is found to provide improved array spatial resolution and dynamic range. The computational time required for the functional beamforming is approximately the same as that for the conventional frequency domain beamformer and, in general, notably shorter than those of the deconvolution methods. In this paper, several simulations are presented comparing the performance of this algorithm with other imaging methods. Moreover, this beamforming technique is applied to 115 flyover measurements performed with a 32 microphone array on landing aircraft. The simulated and experimental results show good agreement. It is found that, for both synthetic and experimental data, functional beamforming offers better quality acoustic images, with a dynamic range (i.e., the difference in decibels between the main lobe and the highest sidelobe) approximately 30 times larger and an array spatial r...