Sound reproducing apparatus capable of self diagnostic and self-diagnostic method for a sound reproducing apparatus

A sound reproducing apparatus capable of self-diagnostic, comprising:

• a directional speaker emitting ultrasound waves to a target object;
• an information acquisition unit configured to acquire an image of the target object and a sound from the target object;
• a processor electrically connected with the directional speaker and the information acquisition unit;
• at least one of an external device, a display unit and an alarm unit;
• and
• a memory storing an image of the target area previously acquired by the information acquisition unit, wherein
• the processor compares the image acquired by the information acquisition unit with the image stored in the memory to determine an existence and non-existence of a target object having a flat surface area from the image acquired by the information acquisition unit, and wherein
• when the existence of the target object is detected, the processor drives the directional speaker to emit the ultrasound waves to the target object, diagnoses a failure of the directional speaker based on the sound acquired by the information acquisition unit, and outputs the result of the diagnosis of the failure of the directional speaker to at least one of the external device, the display unit and the alarm unit;
• and
• when the non-existence of the target object is detected, the processor scans the image acquired by the information acquisition unit to detect a potential target object having a sufficient flat surface area, and wherein the processor drives the directional speaker to emit the ultrasound waves to the potential target object and determines the potential target object as a new target object if a level of a sound radiated from the potential target object is higher than a given threshold level.