Pandora expands interactive voice ads in beta for more listeners and advertisers and allows free users to unlock on-demand music search with their voice (Paul Sawers/VentureBeat)

Paul Sawers / VentureBeat:
Pandora expands interactive voice ads in beta for more listeners and advertisers and allows free users to unlock on-demand music search with their voice  —  Pandora is expanding the scope of its interactive voice-based advertising today, launching the service in beta for more listeners and advertisers …