Terminal, method, apparatus and electronic device for identifying touch

The present disclosure relates to a terminal, a method, an apparatus and an electronic device for determining a mode of operation. In some aspects, the terminal includes: an ultrasonic wave emitter, an ultrasonic wave signal path and a microphone. The ultrasonic wave emitter is arranged inside the terminal, a first hole is arranged on a side-frame of the terminal for accommodating the microphone, an ultrasonic wave signal emitted by the ultrasonic wave emitter propagates from inside of the terminal to a surface of the terminal via the ultrasonic wave signal path, the microphone is configured to receive an ultrasonic echo signal of the ultrasonic wave signal, and to determine whether the terminal is touched according to the ultrasonic echo signal.