1. A method of designing an earpiece device customized for a predetermined group of individuals, the method comprising: receiving a plurality of images for a respective plurality of individuals, each image including at least one ear anatomy; for each image, extracting a three-dimensional (3D) surface representing the at least one ear anatomy, to form a plurality of extracted surfaces corresponding to the plurality of images; determining at least one statistical measurement representative of at least a portion of the plurality of individuals from among the plurality of extracted surfaces; and optimizing at least one design parameter for the earpiece device based on the at least one statistical measurement for the predefined group among the plurality of individuals, the earpiece device being formed using the optimized at least one design parameter.