We've been covering and tracking ambient noise reduction technologies in smartphones for a while now, and one of the players in that space, Audience, is announcing its fourth generation of smartphone voice processor, the eS700 series. The fourth generation builds on the prior generation by including support for full band voice up to 48 kHz, improvements to the amount of noise rejected (SNRI), and the addition of an always-on voice activation feature similar to the always-on voice feature we saw first in the Moto X called VoiceQ. Keeping with the previous generation, Audience is still offering one version with a built in audio codec for OEMs who wish to go with something other than what the silicon vendor supplies, which now offers better quality sound...

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