Laboratory tests have been performed to obtain transmission loss data for an aircraft cabin with Helmholtz resonators installed in the sidewalls, ceiling, and cabin floor, and to determine the effectiveness of resonator installation. It is shown that resonators installed within the sidewalls of an aircraft cabin can significantly reduce SPL values of the fundamental propfan blade passage frequency within the cabin. Resonator performance can be improved by maximizing resonator nozzle to sidewall spacing, and by avoiding noise flanking paths within the sidewall trim design.
Laboratory testing of a high transmission loss aircraft cabin structure
NOISE-CON 90: National Conference on Noise Control Engineering ; 1990 ; Austin, TX, United States
1990-01-01
Conference paper
No indication
English
TRANSMISSION LOSS PANEL FOR AIRCRAFT CABIN NOISE AND THERMAL TREATMENT
European Patent Office | 2024
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