A sound processing apparatus which can improve precision of analyzes on ambient sounds, carries out analysis on the ambient sounds based upon collected sound signals acquired by two sound collectors. Corresponding system and computer program products are also described. The sensor can be used to measure pressure, acceleration, or force at high temperatures. A subtractor calculates a time difference between a target aerial phase period and the actual aerial phase period in the k-th jump cycle. A contact surface opposite the support on the hood side is connected to the outer skin by a stiffening element extending through a cavity of the framework. A method may include administering to a subject an agent that increases the level of protein or activity of a sirtuin, such as SIRT1.