A device includes an audio capture device for receiving an audio signal in an ultrasonic frequency range. The device includes a processor to determine whether the received audio signal corresponds to an ultrasonic message. The processor extracts a content of the ultrasonic message, when it is determined that the received audio signal corresponds to an ultrasonic message, automatically handles the ultrasonic message based on the extracted content, stores at least a portion of the content of the ultrasonic message, and displays the portion of the content of the ultrasonic message to a user of the mobile device at a time subsequent to a time of the receipt of the audio signal.