Versatile system analysis procedure based on a frequency domain variant of velvet noise
Hideki Kawahara, Ken‐Ichi Sakakibara, Mitsunori Mizumachi, Masanori Morise, Hideki Banno · The Journal of the Acoustical Society of America · 2020
We introduce a method that enables the simultaneous measurement of system attributes. The attributes are the linear time-invariant, nonlinear time-invariant, and random and extra responses without introducing additional equipment and post-processing. This new procedure uses a new member of time stretched pulses called FVN (Frequency domain variant of Velvet Noise). A high degree of design freedom makes individual FVN generated using different random number seeds plays the key for making orthogonal sequences. We made this procedure and an interactive and realtime acoustic measurement tool in an open-source repository. This procedure and tool enable in-depth measurement of acoustic systems in everyday conditions. The proposed procedure is general and applies to many fields such as altered auditory feedback experiments and assessment of recording and coding effects on voice research.