The migration towards NGN (Next Generation Networks) is expected to introduce higher propagation delay in telecommunication. This emphasizes the need for reliable echo control. Wideband telephony will further change speech perception - and echo perception. New investigations on echo perception demonstrated the necessity to renew tolerances for wideband echo attenuation. These trends also motivate new echo assessment methods. Current analysis methods typically determine the echo attenuation of terminals as a one-dimensional dB value. Requirements for the echo attenuation are sometimes delay dependent, however, these parameters are inaccurate, neither perception oriented nor aurally adequate. They do not consider wideband specific aspects. A new approach based on a hearing model analysis suitable to extend current echo analysis methods is introduced and discussed in this paper.