An interactive auralization method. Auralization using ambisonics & real-time sound sources

During recent years auralization methods have evolved towards using interactive measures.The use of interactive elements such as navigation in static sound fields has proven to be very significant in order to better integrate the listener with the simulated soundscape.In this study the possibility of engaging the user by actively contributing to the sound field is explored by enabling the subject to make sounds and communicate within the environment.Auralization allows for a subjective evaluation of the acoustical space and therefore plays an important part in a wider understanding of how we are affected by different environmental characteristics.With an auralization framework utilizing realtime sound sources direct experience of the acoustical response of the physical space is enabled and can thus be used as a tool for evaluation.Real-time convolution software implementing this method for performing auralizations has been designed.A subjective evaluation has been made using a ambisonics decoded sound field reproduced through a multi-channel loudspeaker system and a directional microphone with feedback control.Evaluation results indicate a positive response from the subjects to the added control over the simulated space.Further studies need however to be made to analyze the effects the added activity of the listener has on his or her perception of the space.