Mobile carriers are intimately aware of the role voice quality plays in customer retention.one of the primary factors affecting voice quality is environmental noise, so any means of suppressing noise provides a potential differentiator for handset manufacturersrnUntil recently, noise-suppression technology focused on reducing slow-changing stationary noise sources. However, nonstationary noise sources are fast-changing, and the current technology does not suppress them. As a result, subscribers cannot reliably use their handsets on busy streets, in crowded restaurants, or even at home.
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