A system for monitoring pressure change within at least one compartment (40, 50) of an aircraft, comprising: a primary pressure sensor for providing a signal corresponding to a pressure within a primary compartment of an aircraft; a primary monitoring channel, coupled to the primary pressure sensor, comprising: a band pass filter for receiving and filtering the primary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure Δp, and a threshold logic circuit for determining whether the pressure change output signal meets a predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; and a secondary pressure sensor for providing a signal corresponding to a pressure within a secondary compartment of an aircraft adjacent to the primary compartment; a secondary monitoring channel, coupled to the secondary pressure sensor, comprising: a band pass filter for receiving and filtering the secondary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure; and a threshold logic circuit for determining whether the pressure change output signal meets the predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; an output driver, coupled to the primary monitoring channel and the secondary monitoring channel, for receiving the primary threshold output signal and the secondary threshold output signal, for outputting a notification signal, wherein each of the primary and secondary monitoring channels includes respective fault detection comparison circuits (470, 475) for comparing the primary and secondary pressure sensor signals to known values, or to each other, to determine whether an input error occurs, and fault detection reporting circuits (480, 485) for reporting that an input error has occurred if so determined. a primary pressure sensor for providing a signal corresponding to a pressure within a primary compartment of an aircraft; a primary monitoring channel, coupled to the primary pressure sensor, comprising: a band pass filter for receiving and filtering the primary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure Δp, and a threshold logic circuit for determining whether the pressure change output signal meets a predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; and a band pass filter for receiving and filtering the primary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure Δp, and a threshold logic circuit for determining whether the pressure change output signal meets a predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; and a secondary pressure sensor for providing a signal corresponding to a pressure within a secondary compartment of an aircraft adjacent to the primary compartment; a secondary monitoring channel, coupled to the secondary pressure sensor, comprising: a band pass filter for receiving and filtering the secondary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure; and a threshold logic circuit for determining whether the pressure change output signal meets the predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; a band pass filter for receiving and filtering the secondary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure; and a threshold logic circuit for determining whether the pressure change output signal meets the predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold; an output driver, coupled to the primary monitoring channel and the secondary monitoring channel, for receiving the primary threshold output signal and the secondary threshold output signal, for outputting a notification signal, wherein each of the primary and secondary monitoring channels includes respective fault detection comparison circuits (470, 475) for comparing the primary and secondary pressure sensor signals to known values, or to each other, to determine whether an input error occurs, and fault detection reporting circuits (480, 485) for reporting that an input error has occurred if so determined.