An ultrasound device for forming information skeletal density, wherein the ultrasound device comprises: - two transmitters (100, 102) having a known distance calibrated L1 between them for transmitting ultrasound signals into the skeleton, - exactly two receivers (104, 106) for receiving from the skeleton ultrasound signals, and the two transmitters (100, 102) located between the receivers (104, 106), - the ultrasonic signals transmitted from the two transmitters (100, 102) moving over said distance L1 known from opposite directions to eliminate the measurement error caused by soft tissue, - a processor unit (101) configured to form information skeletal density based on ultrasound signals that are received by said receivers (104, 106) when calculating a ultrasound velocity in the skeleton dividing the known distance L1 by an average of a difference of travel time for a ultrasound signal between the receivers (104, 106) receiving said ultrasound signal from one of the two transmitters (100) and a difference in travel time for a ultrasound signal between the receivers receiving said signal ultrasound from the other of the two transmitters (102), - a head (103) as containing said two transmitters (100, 102) and said two receivers (104, 106) in a row and which also contains an electronic system to process measurement data, in which the two transmitters (100, 102) and two receivers (104, 106) are connected to said electronic system, and from the head (103) as there is a connection (109) data wired or wireless unit (101) processor.Un dispositivo de ultrasonido para conformar información de densidad del esqueleto, en el que el dispositivo de ultrasonido comprende: - dos transmisores (100, 102) que tienen una distancia conocida calibrada de L1 entre ellos para transmitir señales de ultrasonido al esqueleto, - exactamente dos receptores (104, 106) para recibir desde el esqueleto señales de ultrasonido, y los dos transmisores (100, 102) localizados entre los receptores (104,
