In electromechanical measurement techniques, passive transducers and passive electrical networks often interact. In some applications, continua are part of the system, in which fields are formed and waves are propagated. If networks, continua and electromechanical transducers feature sufficient amplitude linear behavior in their environment (e.g., in a small region around the operating point) and all elements of the system having constant parameters during the measurement period, the skillful application of the inherent reciprocity of these systems can lead to surprisingly useful benefits. This is shown by actual examples from metrology. Although the facts of the matter are well known, its potential is often overlooked or disregarded in measurement technique.

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