September 2014 research by Northstar for Google found even more impressive daily usage for voice search via personal assistants; 55% and 41% of US teen and adult smartphone users conducted the activity daily, respectively.
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The reasons for turning to personal assistants varied between teens and adults. Those ages 13 to 17 were most likely to use voice search to call someone (43%) or ask for directions (38%)—and they even summoned these resources for homework help. Meanwhile, adults used voice search to ask for directions (40%) and dictate texts (39%). Read the rest at eMarketer.