Analytic representations for the a,mplitude distribution of impulsive noise have generally been presented as numerical approximations to experimental data. While this provides a satisfactory solution to design problems, it is of some interest to consider a simplified physical model of the impulsive noise sources affecting narrow-band receivers, and to compare the results witht he empirical models. In proposing the following model, four characteristic assumptions apply to ther eceived noise: 1) The disturbance is of short enough duration so that the receiver. 2) Separate responses do not overlap in time. 3) Response amplitude is defined as the absolute maximum voltage occuring at the measuring point in the receiver during the given complete response. 4) A response is only considered to be an impulse noise response when its amplitudee xceeds a certaint hreshold value. The model seems to satisfy a degree of physical intuition and may thus serve as a support to the experimentally formulated approsirnation models.