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 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 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.

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.

Abstract: A method for audio processing includes receiving in an electronic processor an audio input from a performance of a musical piece having a score. A two-dimensional state space is defined, including coordinates modeling the performance, each coordinate corresponding to a respective location in the score and a tempo of the performance. For each of a plurality of times during the performance, a probability distribution is computed over the two-dimensional state space based on the audio input. Based on the probability distribution, the performance is matched to the score.