In consequence, the science of acoustics became for the scientific mind of man a model of the required division between the 'subjective' (that is, for scientific considerations non-existent) and the 'objective' (that is, the purely kinematic) part of observation. The field of aural perception seemed to justify the procedure of collecting a mass of phenomena, stripped of all that is experienced by man's soul in meeting them, and of assembling them under a purely abstract concept, 'sound'.