The present invention relates to an ultrasound apparatus (10) for determining a medical condition of a subject (12), comprising: an ultrasound acquisition unit (14) for receiving ultrasound waves (23) from the subject and for providing an ultrasound signal (24) corresponding to articulatory movements of the subject. A processing unit (26) is coupled to the ultrasound acquisition unit for determining a frequency change of the ultrasound signal. An evaluation module (32) evaluates the ultrasound signal and determines the medical condition of the subject on the basis of the frequency change of the ultrasound signal.
