Electronic device and control method thereof

An electronic device comprising:

• a memory to store signal information corresponding to a trigger speech;
• a microphone;
• a communication interface;
• and
• a processor configured to:
• identify whether a first speech signal received through the microphone corresponds to the trigger speech based on the signal information,
• obtain a first speech sharpness value of the first speech signal based on the first speech signal being identified as corresponding to the trigger speech,
• obtain a second speech sharpness value from at least one external device through the communication interface,
• based on the first speech sharpness value being greater than the second speech sharpness value, identify a speech command included in a second speech signal received through the microphone by entering a speech recognition mode, and
• control the electronic device based on the speech command identified from the second speech signal,
• wherein the processor is further configured to, based on the speech command being unidentified from the second speech signal, control the communication interface to transmit a control signal to the at least one external device based on the second speech sharpness value,
• wherein the control signal comprises at least one of a signal to cause the at least one external device to enter a speech recognition mode.