The validity of the theory of the linear response (the satisfaction of the standard spectral relations) during a stochastic resonance is demonstrated. A stochastic resonance in relatively strong fields is studied. The reason for the appearance of a stochastic resonance and the region of parameter values in which it is seen are pointed out.
Translated from the Russian version in Pis'ma Zh. Eksp. Teor Fiz 52, No. 3, 780-782 (10 August 1990).