Owners of new Apple iPhone and iPad products may help improve the voice recognition features of Siri, the voice-activated digital assistant built into the iOS operating system, by participating in the voice training program that comes with iOS 9, as of 2015. This process allows the owner to speak to the device so that it may make note of her voice patterns.
Siri operates on a voice recognition system, meaning that it only responds to verbal commands from the device's owner in order to access information and makes changes to other connected accounts. The iOS 9 version of Apple's mobile operating system includes an option that allows users to say the phrase "Hey Siri" to activate the program rather than pushing a button to bring up the Siri menu. Though the feature is available on all devices that support Siri functionality, the owner must plug the device into a power source to activate it, unless she is using an iPhone 6s or iPhone 6s Plus.
The first time the user turns on this feature, she is taken to a training program that prompts her to say the phrase "Hey Siri" multiple times, sometimes with additional words or phrases. The prompts explain that by saying this phrase at this time, the system can learn the user's voice. This program may also share data with Apple to help it improve its voice recognition software as a whole.