Variable step size Backward differentiation formulae 2 Ordinary differential equations 2 Stiff ordinary differential equations 2 Acoustic echo cancelation 1 Acoustic echo cancellation 1 Adaptive filtering 1 Adaptive filters 1 Approximate solution 1 Computing solutions 1 Cultivation 1 Data reuse 1 Echo suppression 1 First order 1 Impulse response 1 Independent parameters 1 Initial value problems 1 Least mean squares 1 Loudspeakers 1 Maple software 1 Multiple choice 1 Normalized least mean squares algorithms 1 Normalized least-meansquare algorithm 1 Numerical methods 1 Numerical results 1 Parameter estimation 1 Performance 1 Research focus 1 Reusability 1 Stability regions 1