An apparatus for measuring intracranial pressure constituted of: a transmitter arranged to transmit a first acoustic signal through a first cranial point a receiver arranged to receive a second acoustic signal from a second cranial point and a control circuitry, wherein the control circuitry is arranged to: extract from the detected second acoustic signal a first set of frequency components associated with the transmitted first acoustic signal extract from the detected second acoustic signal a second set of frequency components associated with intracranial processes and determine intracranial pressure responsive to the extracted first set of frequency components and the extracted second set of frequency components.
