A method for simulating wave propagation in an environment, comprising the steps of: via a first model of the environment generated with a first modelling method, simulating a first response of the environment in a time and/or frequency domain over a first portion of the domain; and via a further model of the environment generated with a further modelling method, simulating a further response of the environment in the time and/or frequency domain over at least one further portion of the domain, the method further comprising the steps of: simulating the response of the environment over the first portion of the domain which comprises information of a first level of perceptual relevance; and simulating the response of the environment over the further portion of the domain which comprises less perceptually relevant information than the first portion of the domain, and/or the method further comprising the steps of: simulating the response of the environment over the first portion of the domain via a first model having a first level of accuracy; and simulating the response of the environment over the further portion of the domain via a further model having a level of accuracy which is less accurate than the accuracy of the first model, and/or the method further comprising the steps of: simulating the response of the environment over the first portion of the domain via a first model generated by a first modelling method having a first level of computational efficiency, and simulating the response of the environment over a further portion of the domain via a further model generated by a further modelling method having a second level of computational efficiency which is more efficient than the computational efficiency of the first modelling method. via a first model of the environment generated with a first modelling method, simulating a first response of the environment in a time and/or frequency domain over a first portion of the domain; and via a further model of the environment generated with a further modelling method, simulating a further response of the environment in the time and/or frequency domain over at least one further portion of the domain, the method further comprising the steps of: simulating the response of the environment over the first portion of the domain which comprises information of a first level of perceptual relevance; and simulating the response of the environment over the further portion of the domain which comprises less perceptually relevant information than the first portion of the domain, simulating the response of the environment over the first portion of the domain which comprises information of a first level of perceptual relevance; and simulating the response of the environment over the further portion of the domain which comprises less perceptually relevant information than the first portion of the domain, and/or the method further comprising the steps of: simulating the response of the environment over the first portion of the domain via a first model having a first level of accuracy; and simulating the response of the environment over the further portion of the domain via a further model having a level of accuracy which is less accurate than the accuracy of the first model, simulating the response of the environment over the first portion of the domain via a first model having a first level of accuracy; and simulating the response of the environment over the further portion of the domain via a further model having a level of accuracy which is less accurate than the accuracy of the first model, and/or the method further comprising the steps of: simulating the response of the environment over the first portion of the domain via a first model generated by a first modelling method having a first level of computational efficiency, and simulating the response of the environment over a further portion of the domain via a further model generated by a further modelling method having a second level of computational efficiency which is more efficient than the computational efficiency of the first modelling method. simulating the response of the environment over the first portion of the domain via a first model generated by a first modelling method having a first level of computational efficiency, and simulating the response of the environment over a further portion of the domain via a further model generated by a further modelling method having a second level of computational efficiency which is more efficient than the computational efficiency of the first modelling method.