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

Citation Author(s):
Jacob Donley, Christian Ritz, W. Bastiaan Kleijn
Submitted by:
Jacob Donley
Last updated:
12 March 2017 - 1:34am
Document Type:
Poster
Document Year:
2017
Event:
Presenters:
Jacob Donley
Paper Code:
AASP-P5.5
 

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.

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