A system for transmitting information from an information source to an information target wherein a functional structure having a function different from the transmission of information is arranged between the information source and the information target, the system comprising: a source communication device arranged in correspondence to the information source, the source communication device comprising: means (355s,542) for receiving an inbound information message from the information source, means (350s,544-546) for encoding the inbound information message into an inbound information signal according to an information coding based on an information vibration different from an operation vibration of the functional structure in operation, and means (310s,548) for forcing the functional structure to vibrate according to the inbound information signal; and a target communication device arranged in correspondence to the information target, the target communication device comprising: means (310t,574-576) for monitoring a structural vibration of the functional structure to detect an outbound information signal conforming to the information coding, means (350t,578) for decoding the outbound information signal into an outbound information message according to the information coding, means (360t,586-588) for providing an indication of the outbound information message to the information target, characterized in that the target communication device further comprises: means (350t,582) for detecting an end transmission drift in response to a frequency shift of the outbound information signal, means (350t,590) for recognizing, in response to the end transmission drift, a corresponding malfunctioning condition being indicative of a malfunctioning in a section of the functional structure up to the target communication device from the source communication device, and means (360t,596) for outputting an indication of the corresponding malfunctioning condition. a source communication device arranged in correspondence to the information source, the source communication device comprising: means (355s,542) for receiving an inbound information message from the information source, means (350s,544-546) for encoding the inbound information message into an inbound information signal according to an information coding based on an information vibration different from an operation vibration of the functional structure in operation, and means (310s,548) for forcing the functional structure to vibrate according to the inbound information signal; and means (355s,542) for receiving an inbound information message from the information source, means (350s,544-546) for encoding the inbound information message into an inbound information signal according to an information coding based on an information vibration different from an operation vibration of the functional structure in operation, and means (310s,548) for forcing the functional structure to vibrate according to the inbound information signal; and a target communication device arranged in correspondence to the information target, the target communication device comprising: means (310t,574-576) for monitoring a structural vibration of the functional structure to detect an outbound information signal conforming to the information coding, means (350t,578) for decoding the outbound information signal into an outbound information message according to the information coding, means (360t,586-588) for providing an indication of the outbound information message to the information target, characterized in that means (310t,574-576) for monitoring a structural vibration of the functional structure to detect an outbound information signal conforming to the information coding, means (350t,578) for decoding the outbound information signal into an outbound information message according to the information coding, means (360t,586-588) for providing an indication of the outbound information message to the information target, characterized in that means (350t,582) for detecting an end transmission drift in response to a frequency shift of the outbound information signal, means (350t,590) for recognizing, in response to the end transmission drift, a corresponding malfunctioning condition being indicative of a malfunctioning in a section of the functional structure up to the target communication device from the source communication device, and means (360t,596) for outputting an indication of the corresponding malfunctioning condition.