Abstract: To obtain information on operation of an electrical machine, sound data, which includes time series of sound pressure data captured at the time the electrical machine is running at a site the electrical machine locates of the electrical machine, is obtained. Further, dentification information of the electrical machine is obtained. Using the identification information, at least one parameter value stored in a digital model of the electrical machine is obtained. Then, using at least the sound data and the at least one parameter value, at least one first value indicating operation of the electrical machine is determined and displayed.

Abstract: Method for manufacturing a pipe for a pipeline, wherein at least part of the pipe is manufactured by additive manufacturing process, wherein at least one space for an ultrasonic transducer is formed inside the material of the pipe during the additive manufacturing process. The additive manufacturing process is interrupted before the space in closed, and the ultrasonic transducer is inserted in the open space, and the additive manufacturing process for manufacturing the pipe is continued. The invention also relates to such a pipe.