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.
Flight Investigation of Cabin Noise Control Treatments for a Light Turboprop Aircraft
Sae Technical Papers
General Aviation Aircraft Meeting and Exposition ; 1985
1985-04-01
Conference paper
English
In-flight speech intelligibility assessment in a light turboprop aircraft cabin
British Library Conference Proceedings | 2006
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