Visualization of the sound field in the cabin of the SUPERJET 100 aircraft using a spherical microphone array

The results of localization and ranking by intensity of noise sources in the cockpit and passenger cabin of the Superjet 100 aircraft using the Simcenter Solid Sphere 3DCAM54/78 spherical array are presented. In-flight tests were performed in cruising flight mode. At the same time, two modes of operation of the air conditioning system were considered. Noise maps were obtained using a standard spherical beamforming algorithm for overall radiation and radiation in separate 1/3-octave frequency bands. The possibility of using this technology to localize sources of increased noise in the cabin is shown. The sound field in the cabin of the aircraft is complex in its structure and the noise sources associated with the operation of the air conditioning system are expected to be localized from the air supply pipelines to the cabin. It is shown that the increase in the sound insulation of the rear fuselage of the cabin due to the installation of the interior panel in flight conditions is ∼2dBA.