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.
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.