Abstract: Embodiments herein relate to setting a lens position based on focus scores. A plurality of initial positions of a lens are determined. Each of the initial positions may correspond to a position of the lens at which one of a plurality of objects has a highest quality. A focus score may be determined at each of the initial positions for the corresponding object having the highest quality. A final position of the lens between two of the initial positions may be calculated based on the focus scores.

Abstract: An electroacoustic transducer 1 is provided with a diaphragm 20 which is made of a magnetic material, and to which a magnetic piece 21 is fixed; a magnetic core 22 which is placed in proximity to the diaphragm 20; a coil 23 which supplies an oscillating magnetic field to the magnetic core 22; a housing 10 which accommodates the diaphragm 20, the magnetic core 22, and the coil 23, and which has a sound release opening 11 in a top plate opposed to the diaphragm 20, the sound release opening being larger than the magnetic piece 21. A beam portion 12 is formed integrally with the housing 10 which extends from a peripheral portion of the sound release opening 11 to another peripheral portion passing above the magnetic piece 21. A gap Ga between the diaphragm 20 and the magnetic core 22, and a gap Gb between the magnetic piece 21 and the beam portion 12 satisfy relationships of Ga≦Gb≦5Ga.