With advances in speech recognition technology, voice controlled devices (VCD) are become increasingly prevalent in homes as cheaper alternatives to devices with visual displays.
Personal assistants, including Amazon’s Alexa, Google Home, and Apple’s Siri, are examples of recent products that have been rapidly growing in popularity. These services enable users to use their voice to ask general search questions, perform administrative and home automation tasks, and other tasks commonly performed via smartphones. As of October 2017, 20.5 million Amazon Echos and 4.6 million Google Homes have been sold. Other products such as speech controlled light bulbs, outlets, and thermostats can also be found on the market. In the coming years, we can expect an increase in the number of voice-controlled device produced and sold.