An ultrasound device captures skeleton density information. This ultrasound device includes at least two transmitters 100, 102 having a distance of L1 between them for transmitting ultrasound signals into the skeleton, at least two receivers 104 having a distance of L2 between them for receiving ultrasound signals from the skeleton, as the calibrated known distance L is at least one of distances L1 and L2. The ultrasound device also includes a processing unit 101 for calculating a ultrasound velocity in the skeleton for forming skeleton density information on the basis of the ultrasound signals received by the receivers 104, 106 by dividing known distance by an average of a travel time difference for a ultrasound signal between the receivers 104, 106 receiving the ultrasound signal from the first transmitter 100 and the second transmitter 102.
