An audio apparatus includes a converter having a sound-output mode in which the converter functions as a sound-output device for converting a sound signal into an audio output and a sound-pickup mode in which the converter functions as a sound-pickup device for converting an audio signal into a sound output, a controller switching the converter to the sound-output mode or the sound-pickup mode, an analyzing section analyzing the sound output generated from the converter that is switched to the sound-pickup mode by the controller, and an alarm section generating an alarm signal based on an analysis result from the analyzing section.