Directional acoustic sensor and electronic device including the same

A directional acoustic sensor comprising:

• a vibration body array comprising a plurality of vibration bodies arranged such that, when a target sound is received to the vibration body array, one or more of the plurality of vibration bodies selectively react according to a direction of the target sound;
• and
• a first processor estimating a sound source distribution profile of the target sound by comparing outputs of the one or more of plurality of vibration bodies with each other,
• wherein the plurality of vibration bodies comprises at least one first vibration body having a first resonant frequency and at least one second vibration body having a second resonant frequency, different from the first resonant frequency,
• wherein the plurality of vibration bodies are grouped into a plurality of subgroups, each subgroup oriented in a different direction, and
• wherein each of the plurality of subgroups comprises one of the at least one first vibration body having the first resonant frequency and one of the at least one second vibration body having the second resonant frequency, different from the first resonant frequency.