A system for acoustically detecting dielectric breakdown or partial discharge of an electrical device, the system comprising: at least one electroacoustic, EA, transducer configured to detect an acoustic vibration of the electrical device; a controller electrically connected to the at least one EA transducer, and a quadrilateral detection circuit having four legs, wherein three (204, 206, 208) of the four legs have a known resistance, and wherein the fourth leg includes the electrical device, and wherein the quadrilateral detection circuit is electrically connected to the controller; wherein the controller is configured to execute instructions stored in a memory, which when executed, cause the controller to at least: receive a signal from the at least one EA transducer; analyze the signal received from the at least one EA transducer; determine, based upon the analyzing, whether the signal received from the at least one EA transducer includes data associated with an acoustic vibration in a frequency range of partial discharge of the electrical device; receive at least one measurement from the quadrilateral detection circuit, wherein the measurement is any of a voltage across the electrical device, a differential voltage (V d) between third leg and fourth leg and a current (I 1-3) passing through the electrical circuit; and in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge, verify the determination based upon the at least one measurement received from the quadrilateral detection circuit; and generate an alert in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge. at least one electroacoustic, EA, transducer configured to detect an acoustic vibration of the electrical device; a controller electrically connected to the at least one EA transducer, and a quadrilateral detection circuit having four legs, wherein three (204, 206, 208) of the four legs have a known resistance, and wherein the fourth leg includes the electrical device, and wherein the quadrilateral detection circuit is electrically connected to the controller; wherein the controller is configured to execute instructions stored in a memory, which when executed, cause the controller to at least: receive a signal from the at least one EA transducer; analyze the signal received from the at least one EA transducer; determine, based upon the analyzing, whether the signal received from the at least one EA transducer includes data associated with an acoustic vibration in a frequency range of partial discharge of the electrical device; receive at least one measurement from the quadrilateral detection circuit, wherein the measurement is any of a voltage across the electrical device, a differential voltage (V d) between third leg and fourth leg and a current (I 1-3) passing through the electrical circuit; and in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge, verify the determination based upon the at least one measurement received from the quadrilateral detection circuit; and generate an alert in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge. receive a signal from the at least one EA transducer; analyze the signal received from the at least one EA transducer; determine, based upon the analyzing, whether the signal received from the at least one EA transducer includes data associated with an acoustic vibration in a frequency range of partial discharge of the electrical device; receive at least one measurement from the quadrilateral detection circuit, wherein the measurement is any of a voltage across the electrical device, a differential voltage (V d) between third leg and fourth leg and a current (I 1-3) passing through the electrical circuit; and in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge, verify the determination based upon the at least one measurement received from the quadrilateral detection circuit; and generate an alert in response to determining that the signal received from the at least one EA transducer includes the data associated with the acoustic vibration in the frequency range of partial discharge.