Active Speech Control using Wave-Domain Processing with a Linear Wall of Dipole Secondary Sources

Authors

Jacob Donley, University of WollongongFollow
Christian H. Ritz, University of WollongongFollow
Bastiaan (Willem) Kleijn, Victoria University of WellingtonFollow

RIS ID

111046

Publication Details

J. Donley, C. Ritz & W. Kleijn, "Active Speech Control using Wave-Domain Processing with a Linear Wall of Dipole Secondary Sources," in 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2017, pp. 456-460.

Abstract

In this paper, we investigate the effects of compensating for wave-domain filtering delay in an active speech control system. An active control system utilising wave-domain processed basis functions is evaluated for a linear array of dipole secondary sources. The target control soundfield is matched in a least squares sense using orthogonal wavefields to a predicted future target soundfield. Filtering is implemented using a block-based short-time signal processing approach which induces an inherent delay. We present an autoregressive method for predictively compensating for the filter delay. An approach to block-length choice that maximises the soundfield control is proposed for a trade-off between soundfield reproduction accuracy and prediction accuracy. Results show that block-length choice has a significant effect on the active suppression of speech.