Abstract: A method for switching a screen state, a terminal, and computer-readable medium are provided. The method includes: transmitting a transmission sound wave when it is detected that the screen state of the terminal is in a light-on state during a voice communication session, the transmission sound wave being a sound wave of a pre-defined frequency; determining a target detection region when a target receiving sound wave is received through a plurality of pre-installed sound wave receiving devices, the target receiving sound wave being formed by reflecting the transmission sound wave by a target object; and switching the screen state of the terminal from the light-on state into a light-off state when it is determined that the target object is located in the target detection region.

Abstract: Systems and methods of testing call quality and control devices are provided according to examples of the present disclosure. In one aspect, the system includes a simulation base station, a tested communication device, a control device configured to transmit a call instruction such that a call between the tested communication device and the simulation base station is established, and a testing device configured to provide a standard audio, where the standard audio becomes a test audio after it is processed by the tested communication device during a transmission process via the call and the test audio is sent back to the testing device, and perform a similarity comparison between the test audio and the standard audio to obtain a similarity comparison result, where the similarity comparison result shows the call quality of the tested communication device.

Abstract: A method for switching a screen state, a terminal, and computer-readable medium are provided. The method includes: transmitting a transmission sound wave when it is detected that the screen state of the terminal is in a light-on state during a voice communication session, the transmission sound wave being a sound wave of a pre-defined frequency; determining a target detection region when a target receiving sound wave is received through a plurality of pre-installed sound wave receiving devices, the target receiving sound wave being formed by reflecting the transmission sound wave by a target object; and switching the screen state of the terminal from the light-on state into a light-off state when it is determined that the target object is located in the target detection region.