The early stages of the auditory system need to preserve the timing information of sounds in order to extract the basic features of acoustic stimuli. At the same time, different processes of neuronal adaptation occur at several levels to further process the auditory information. For instance, auditory nerve fiber responses already experience adaptation of their firing rates, a type of response ...

We present an automatic segmentation method for the extraction of first Heschl’s gyrus (HG), the morphological landmark for human primary auditory cortex. Extracted HG regions can be used to test functional hypotheses about this area using a region-of-interest (ROI)based approach. The proposed technique consists of a coarse segmentation phase using a statistical deformation-based atlas, followe...

We describe a novel paradigm for automatic speech recognition in noisy environments in which an initial stage of auditory scene analysis separates out the evidence for the speech to be recognised from the evidence for other sounds. In general, this evidence will be incomplete, since intruding sound sources will dominate some spectro-temporal regions. We generalise continuous-density hidden Mark...

Deficits of auditory scene analysis accompany Alzheimer's disease (AD). However, the functional neuroanatomy of spatial sound processing has not been defined in AD. We addressed this using a "sparse" fMRI virtual auditory spatial paradigm in 14 patients with typical AD in relation to 16 healthy age-matched individuals. Sound stimulus sequences discretely varied perceived spatial location and pi...

In the auditory cortex, primitive features of acoustic stimuli are represented for auditory scene analysis. A typical example of a feature representation is the tonotopic map, in which sound frequencies are spatially arranged in an orderly manner. Some neurons in the auditory cortex are sensitive to sound source location, which is another important feature for auditory scene analysis. In the pr...

2 In this article, we give an overview of a range of approaches to the analysis and separation of musical audio. In particular, we consider the problems of automatic music transcription and audio source separation, which are of particular interest to our group. Monophonic music transcription, where a single note is present at one time, can be tackled using an autocorrelation-based method. For p...

There is a renewed interest in the use of X-band weather radars, due to specific advantages such as applications to rainfall estimation in light rain, monitoring of sensitive areas that are inadequately covered by operational radar networks as well as the radar network concept introduced by the Center for Collaborative Adaptive Sensing of the Atmosphere (CASA) (Chandrasekar et al. 2004). The us...