Method of providing service based on location of sound source and speech recognition device therefor

A speech recognition device comprising:

• at least one microphone configured to receive a sound signal from a first sound source;
• and
• at least one processor configured to:
• determine a direction of the first sound source based on the sound signal,
• determine whether the direction of the first sound source is in a registered direction, and
• based on whether the direction of the first sound source is in the registered direction, recognize a speech from the sound signal regardless of whether the sound signal comprises a wake-up keyword as a part of the sound signal,
• wherein the at least one processor is further configured to:
• based on a plurality of sound signals received from a plurality of directions, determine a frequency that a speech recognition service is requested, respectively, in correspondence to the plurality of directions, and
• determine a direction, which corresponds to a determined frequency equal to or greater than a critical value from among the plurality of directions, as the registered direction.