Systems and methods for providing audio content and hearing-enhancement devices are provided. Systems and methods can be tailored to providing audio content to the hearing impaired, and can include evaluating a response profile of a listener; determining preferred ultrasonic signal parameters based on the listener's response profile; configuring an ultrasonic audio system according to the determined ultrasonic signal parameters; and using the ultrasonic audio system to transforming an audio signal into an ultrasonic pressure wave representing the audio signal.