An apparatus that is configured to sense the presence of gases, vapors and liquids using acoustic waves. Each memory cell forms a resistive cross point of one word line and one bit line, respectively. The information processing apparatus may further include an acceptance section configured to accept a variation amount to a value corresponding to the setting data inputted by a user, and a variation section configured to vary the setting data reproduced by the reproduction section based on the variation amount accepted by the acceptance section. In a first configuration, the first door is in the closed position such that the first door obstructs a first portion of a body opening and the second door is in a first position such that the second door obstructs a second portion of the body opening.