Abstract: A system for adjusting volume and ambient sounds in an earphone device with Active Noise Cancelling (ANC) functionality, implemented using a microphone and a signal processor, wherein a signal mixer is configured to, in response to detecting a rotation of a first dial connected to the earphone device, adjust the proportions between a group of signals in a mixed signal generated for the speaker of the earphone device, and thereby enabling precise and intuitive control of both playback volume and ambient sound processing.

Abstract: A method includes: randomly displaying a string of text characters on a lock screen of the terminal, where the text characters include a first-type character and a second-type character, the second-type character is used to indicate a location of a to-be-entered password character in the text characters, and the first-type character and the to-be-entered password character form a password character string used for unlocking the terminal; receiving voice information, and recognizing an unlocking character string from the voice information; determining whether the unlocking character string matches the password character string; if the unlocking character string matches the password character string, parsing, by the terminal, the voice information, to obtain a voiceprint in the voice information; determining whether the voiceprint in the voice information is the same as a preset voiceprint; and unlocking the terminal if the voiceprint in the voice information is the same as the preset voiceprint.