[Automatic regulation in the auditory analyzer and the phenomenon of accelerated growth of loudness]. 
Physical analysis of the ear periphery structure and the data on loudness perception have been used to develop a model of loudness measurement and self-control in the hearing analyzer.  The experimental results obtained recently by different researchers are shown to confirm that the basic ideas of this model are reasonable, and the model is of considerable heuristic importance.  The author provides treatment of the main hearing "paradox", that is the existence of a wide dynamic range of loudness perception for a narrow range of afferent pulsation in auricular nerve fibers.  A simple explanation is found for the so-called adaptation phenomenon.  The explanation of the phenomenon of loudness increase acceleration typical for many forms of neurosensory hypoacousis opens up new perspectives in the diagnostics and treatment of these diseases.