There is provided a condenser microphone unit in which the shield of a shielding member that covers a front acoustic terminal from the inside of a unit case is assured to prevent noise caused by electromagnetic waves radiated especially from a cellular phone from being generated. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. A cover comprising an inelastic fiber. A sensor fan is provided close to the intake opening of the manifold for drawing the flatulence air into the system as soon as it is expelled by the person.