Title :
Perceptual evaluation of interior aircraft sound models
Author :
Langlois, Jennifer ; Verron, Charles ; Gauthier, Philippe-Aubert ; Guastavino, Catherine
Author_Institution :
Multimodal Interaction Lab., McGill Univ., Montreal, QC, Canada
Abstract :
We report a listening test conducted to investigate the validity of sinusoids+noise synthesis models for interior aircraft sounds. Two models were evaluated, one for monaural signals and the other for binaural signals. A parameter common to both models is the size of the analysis/synthesis window. This size determines the computation cost and the time/frequency resolution of the synthesis. To evaluate the perceptual impact of reducing the window size, we varied systematically the size Ns of the analysis/synthesis window. We used three reference sounds corresponding to three different rows. Twenty-two participants completed an ABX discrimination task comparing original recorded sounds to various resynthesized versions. The results highlight a better discrimination between resynthesized sounds and original recorded sounds for the monaural model than for the binaural model and for a window size of 128 samples than for larger window sizes. We also observed a significant effect of row on discrimination. An analysis/synthesis window size Ns of 1024 samples seems to be sufficient to synthesize binaural sounds which are indistinguishable from original sounds; but for monaural sounds, a window size of 2048 samples is needed to resynthesize original sounds with no perceptible difference.
Keywords :
acoustic signal processing; aircraft; aircraft sounds; binaural signals; interior aircraft sound models; listening test; monaural signals; perceptual evaluation; sinusoids noise synthesis models; synthesize binaural sounds; Aircraft; Aircraft propulsion; Analytical models; Atmospheric modeling; Conferences; Stochastic processes; Time frequency analysis; binaural signal; interior aircraft sounds; listening test; monaural signal; sinusoids+noise synthesis model;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics (WASPAA), 2011 IEEE Workshop on
Conference_Location :
New Paltz, NY
Print_ISBN :
978-1-4577-0692-9
Electronic_ISBN :
1931-1168
DOI :
10.1109/ASPAA.2011.6082339