Download Statistical Measures of Early Reflections of Room Impulse Responses
An impulse response of an enclosed reverberant space is composed of three basic components: the direct sound, early reflections and late reverberation. While the direct sound is a single event that can be easily identified, the division between the early reflections and late reverberation is less obvious as there is a gradual transition between the two. This paper explores two statistical measures that can aid in determining a point in time where the early reflections have transitioned into late reverberation. These metrics exploit the similarities between late reverberation and Gaussian noise that are not commonly found in early reflections. Unlike other measures, these need no prior knowledge about the rooms such as geometry or volume.
Download 3D interactive environment for music collection navigation
Previous interfaces for large collections of music have used spatial audio to enhance the presentation of a visual interface or to add a mode of interaction. An interface using only audio information is presented here as a means to explore a large music collection in a two or three-dimensional space. By taking advantage of Ambisonics and binaural technology, the application presented here can scale to large collections, have flexible playback requirements, and can be optimized for slower computers. User evaluation reveals issues in creating an intuitive mapping between between user movements in physical space and virtual movement through the collection, but the novel presentation of the music collection has positive feedback and warrants further development.