Abstract: A method of cyber protection of a machine based on acquiring acoustic signals from a vicinity of the machine, while the machine is operative. The method includes analyzing the acquired acoustic signals to determine whether the machine or a controller of the machine is operating suspiciously and initiating a cyber measure on the controller of the machine, responsive to a determination based on the acquired acoustic signals that the machine or the controller is operating suspiciously.

Abstract: A method includes acquiring, by a vibro-acoustic sensor in a vicinity of a machine, vibro-acoustic signals due to an operation of the machine. The acquired vibro-acoustic signals are analyzed so as to estimate at least two operational parameters of the machine, selected from a group of the operational parameters consisting of an uptime factor, a production speed factor, and a production quality factor of the machine. An overall equipment effectiveness (OEE) of the machine is computed, the computed OEE including at least one of a minimum and a product of the at least two estimated operational parameters.

Abstract: A method of cyber protection of a machine based on acquiring acoustic signals from a vicinity of the machine, while the machine is operative. The method includes analyzing the acquired acoustic signals to determine whether the machine or a controller of the machine is operating suspiciously and initiating a cyber measure on the controller of the machine, responsive to a determination based on the acquired acoustic signals that the machine or the controller is operating suspiciously.

Abstract: Monitoring of a machine is performed by an acoustic monitor which acquires, through an acoustic sensor, acoustic signals from a vicinity of a machine, while the machine is operative. A processor calculates a frequency spectrum of a segment of the acquired acoustic signals, determines boundaries of a frequency band to be analyzed and extracts, from the calculated frequency spectrum, a base frequency window in the determined boundaries, and one or more harmonics windows of harmonics of the determined boundaries. For each of the base and harmonic windows a weight based on a distribution of values of frequencies in the windows is determined and a parameter of operation of the machine is calculated as a function of a weighted sum of the base and harmonic windows. The operation of the machine is evaluated responsive to the calculated parameter.