A method for recording multi-phase flows through a transport system

A method for determining the flow situation in a transport system where the flow medium occurs in multi-phase and is conducted through a structural detail (20), e.g. a choke valve, which acts on the flow of said medium and produces turbulence causing acoustic energy signals which are generated in and immediately close to structural detail (20) and are sensed by one or a plurality of acoustic sensor means (9) with an acoustic broadband connection with said structural detail, which means (9) converts (10) the energy signal to transmittable signals to a signal processing unit (11) utilizing signal analysis principles known per se to provide interpretable information on the actual flow situation and the flowing medium which is influenced by structural detail (20). Structural detail (20) to which acoustic sensor means (9) is connectd may, e.g. be connected with a subsea production system.