Flight Investigation of Cabin Noise Control Treatments for a Light Turboprop Aircraft 850876
The in-flight evaluation of noise control treatments for a light, twin-engined turboprop aircraft presents several problems associated with data analysis and interpretation. These problems include data repeatability, propeller synchronization, spatial distributions of the exterior pressure field and acoustic treatment, and the presence of flanking paths. They are discussed here with regard to a specific aeroplane configuration. Measurements were made in an untreated cabin and in a cabin fitted with an experimental sidewall treatment. Results are presented in terms of the insertion loss provided by the treatment and comparison made with predictions based on laboratory measurements.
Citation: Wilby, J., O’Neal, R., and Mixson, J., "Flight Investigation of Cabin Noise Control Treatments for a Light Turboprop Aircraft," SAE Technical Paper 850876, 1985, https://doi.org/10.4271/850876. Download Citation
Author(s):
John F. Wilby, Robert L. O’Neal, John S. Mixson
Pages: 16
Event:
General Aviation Aircraft Meeting and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1985 Transactions-V94-85
Related Topics:
Aircraft
Acoustics
Noise
Propellers and rotors
Pressure
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