A sound processing method, comprising: obtaining sound data and image data, wherein the sound data is collected from a sound source in a given area by a sound collection unit including a plurality of microphones and the image data is captured by an imaging unit which captures an image at least partially in the given area; designating a direction defined relative to the sound collection unit, wherein the designated direction corresponds to a designation part on an image displayed based on the image data; designating an arbitrary directivity range in the given area, wherein the designated arbitrary directivity range corresponds to the designation part on the image displayed based on the image data; and emphasizing a sound component in the sound data in the designated direction within the designated arbitrary directivity range, wherein the designation part is a portion of the image with designated position and designated size, wherein the sound processing method further comprises: detecting a predetermined sound from the sound component in the direction and the arbitrary directivity range emphasized by a directivity processing unit; and performing a predetermined processing in response to the detection of the predetermined sound, wherein the predetermined processing includes to cause a recording unit which records the sound data and the image data to record one or more search tags associated with the sound data and the image data in response to the detection of the predetermined sound, wherein the one or more search tags are adapted for searching sound data including the predetermined sound or image data including a sound source of the predetermined sound from the recording unit. obtaining sound data and image data, wherein the sound data is collected from a sound source in a given area by a sound collection unit including a plurality of microphones and the image data is captured by an imaging unit which captures an image at least partially in the given area; designating a direction defined relative to the sound collection unit, wherein the designated direction corresponds to a designation part on an image displayed based on the image data; designating an arbitrary directivity range in the given area, wherein the designated arbitrary directivity range corresponds to the designation part on the image displayed based on the image data; and emphasizing a sound component in the sound data in the designated direction within the designated arbitrary directivity range, wherein the designation part is a portion of the image with designated position and designated size, wherein the sound processing method further comprises: detecting a predetermined sound from the sound component in the direction and the arbitrary directivity range emphasized by a directivity processing unit; and performing a predetermined processing in response to the detection of the predetermined sound, wherein the predetermined processing includes to cause a recording unit which records the sound data and the image data to record one or more search tags associated with the sound data and the image data in response to the detection of the predetermined sound, wherein the one or more search tags are adapted for searching sound data including the predetermined sound or image data including a sound source of the predetermined sound from the recording unit. detecting a predetermined sound from the sound component in the direction and the arbitrary directivity range emphasized by a directivity processing unit; and performing a predetermined processing in response to the detection of the predetermined sound, wherein the predetermined processing includes to cause a recording unit which records the sound data and the image data to record one or more search tags associated with the sound data and the image data in response to the detection of the predetermined sound, wherein the one or more search tags are adapted for searching sound data including the predetermined sound or image data including a sound source of the predetermined sound from the recording unit.