Exterior acoustic array measurements on the bombardier global express

Auteurs-es

  • Antoine Malkoun Acoustics and Vibration Department, Bombardier, Aerospace Division, Dorval, Que. H4S 1Y9, Canada
  • Robby Lapointe Acoustics and Vibration Department, Bombardier, Aerospace Division, Dorval, Que. H4S 1Y9, Canada

Mots-clés :

Beamforming, Computer software, Microphones, Acoustic cameras, Bombardier global express, Time synchronization

Résumé

A methodology and in-house software were developed that uses a large number of microphones to focus on sound coming from a specific direction and measure the bombardier global express. A temporal delay-and-sum beamforming technique was developed at Bombardier to process the phased array data. The method consists in using a large number of microphones to focus on sound coming from a specific direction. The sensor outputs are delayed by appropriate amounts and added together reinforce the signal emanating from a specific region in space. It can be described as an acoustic camera, where the focus can be electronically shifted in space by manipulating the phases of the signals, similarly to how a parabolic antenna is mechanically aimed. A time-synchronization was done between the flight data recorded onboard and the acoustic data recorded on the ground via an event-tone transmitted over VHF.

Fichiers supplémentaires

Publié-e

2007-09-01

Comment citer

1.
Malkoun A, Lapointe R. Exterior acoustic array measurements on the bombardier global express. Canadian Acoustics [Internet]. 1 sept. 2007 [cité 22 juill. 2024];35(3):30-1. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1888

Numéro

Vol. 35 No. 3 (2007)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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