The recovery from impulse-noise induced temporary threshold shift was systematically traced for individual rhesus monkeys and men. In addition to the well-known logarithmic recovery, three other types of recovery were seen (diphasic, plateau, and rebound). A descriptive model is developed for the classification of these recovery functions. The model postulates the existence of two types of temporary threshold shift, process M and process S, both of which may be seen after impulse-noise exposure.
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Luz et al. (1971) studied this question.