The phonetic properties of six Malay vowels are investigated using magnetic resonance imaging (MRI) to visualize the vocal tract in order to obtain dynamic articulatory parameters during speech production. To resolve image blurring due to the tongue movement during the scanning process, a method based on active contour extraction is used to track tongue contours. The proposed method efficiently...

] was apparently the first to establish theoretically a simple relation between deterministic Green's function and cross-correlation of fluctuations of wave fields generated by random sources. He used reciprocity considerations to analyze fluctuations of electromagnetic fields. An acoustic counterpart of the Rytov's approach was applied in [O. A. Godin, Emergence of the acoustic Green's functio...

The acoustic emission signal contains information about the fracture process which emits the signal and its travel path to the recording sensor. This is expressed in the signal's shape. Estimating the cross correlation function or the magnitude squared coherence function between several signals of clustered events, leads to information about the similarity of these signals, i.e. about the fract...

This paper focuses on acoustic road traffic monitoring and looks, more specifically, into the problem of joint speed and wheelbase length estimation of two-axle vehicles as they pass by. It is known that both front and rear axle trajectories may be observed using a cross-correlation based processing in conjunction with a well designed two-element microphone array placed on the roadside. This is...

In order to incorporate long temporal-frequency structure for acoustic event detection, we have proposed a spectral patch based learning and representation method. The learned spectral patches were regarded as acoustic words which were further used in sparse encoding for acoustic feature representation and modeling. In our previous study, during feature encoding stage, each spectral patch was e...

This paper investigates whether a speech recognizer is useful for characteristic analysis of lecture speech or not. It is important to pay attention to how we speak in order to effectively convey the meaning of what we are trying to say to someone. We have examined how various acoustic features included in a lecture speech influence the understanding, and change the impression, of the speech, w...