Electronic device and method, in electronic device, for determining whether object is near

A method of determining whether an object is close to an electronic device including an application processor including an audio processing module and a voice recognition module, a microphone, a speaker, and a sensor hub, the method comprising:

• while the audio processing module is in an active state, generating, by the application processor, an ultrasonic signal and providing, by the application processor, the ultrasonic signal to the speaker via the audio processing module;
• and
• while the audio processing module is in a sleep state:
• generating, by the sensor hub, the ultrasonic signal and providing, by the sensor hub, the ultrasonic signal to the speaker so that the speaker outputs a first signal including the ultrasonic signal,
• receiving, by the sensor hub, from the voice recognition module a second signal input through the microphone in the sleep state of the audio processing module, and
• determining, by the sensor hub, whether an object is close to the electronic device based on at least the first signal and the second signal,
• wherein a first ultrasonic engine included in the audio processing module generates the ultrasonic signal while the audio processing module is in the active state, and a second ultrasonic engine, which is different from the first ultrasonic engine and included in the sensor hub, generates the ultrasonic signal while the audio processing module is in the sleep state.