With the emergence of multimedia technology, it has become important to be able to support a diverse set of client applications (simply called application. henceforth), each with its own Quality-of-Service (QoS) requirement. Such .oft real-time applications exhibit remarkable loss tolerance capacity, provided the losses are well regulated. In this paper, we propose the notion of a notieeable 1011, which directly relates loss pattern to the perceived QoS for an application, and use it to evaluate a novel resource management algorithm that attempts to provide acceptable QoS to individual applications. We apply our model to a real-world application, and provide simulation results to illustrate the performance of this algorithm.