Sound attenuation panel for aircraft having a combination of acoustic attenuation properties. The acoustic panel includes an acoustic structure having a cellular structure and a resistive skin and a backing skin, the acoustic panel also including at least one auxiliary acoustic device with cavities that is configured to produce additional acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure and including adjacent chambers or cavities separated by shared walls, each of the chambers or cavities having perforations and being adapted to produce acoustic absorption. The combination of the acoustic structure and the auxiliary acoustic device with cavities enables combination of the acoustic absorption properties of these two types of element and an increased range of frequencies of the noise that can be attenuated by the acoustic panel without increasing its overall size.
SOUND ATTENUATION PANEL FOR AIRCRAFT HAVING A COMBINATION OF ACOUSTIC ATTENUATION PROPERTIES
2019-10-10
Patent
Elektronische Ressource
Englisch
Sound attenuation panel for aircraft having a combination of acoustic attenuation properties
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