Mobile apparatus, method of controlling the same, and program

Provided is a notice apparatus including: a plurality of notice signal generation units which generate notice signals; a reference signal output unit which outputs a reference signal used to determine an environmental situation; a reference signal detection unit which detects the reference signal output from the reference signal output unit and generates the detected reference signal as a detection signal; and a notice controller which controls one of the notice signal generation units to generate the notice signal based on the detection signal generated by the reference signal detection unit.