Comparison between fabric frictional sound parameters and wearers’ subjective auditory sensibility of PCM-treated combat uniforms

Discrimination of fabric frictional sounds based on Haar features

“…Thus, some scholars have built sound parameters upon a fast Fourier transform (FFT), studied the relation between the fabric frictional signal and its mechanical properties that are acquired with the Kawabata Evaluation System, and predicted certain mechanical properties according to the sound characteristics 6 or vice versa. 7 With sound parameters extracted from FFT, researchers have also investigated various types of fibers, 8 cross-sectional shapes, 9 yarn structures, weave structures, 10 and mechanical velocities 11 for their effects on frictional signals, studied the relationship between frictional signals and subject perceptions from questionnaire survey 12 or Zwicker's psychoacoustic models, 13 and clustered the signals by autoregression. 14 However, the Fourier spectrum has its drawbacks as it can only reflect frequency information, ignoring phase data.…”