This paper presents a robust speech recognition method based on the HMM composition for the noisy room acoustics distorted speech. The method realizes an improved user interface such as the user is not encumbered by microphone equipments. The proposed HMM composition is obtained by naturally extending the HMM composition method of an additive noise to that of the convolutional room acoustics di...

The objective of the ocean acoustics components of the GOATS project is to develop a fundamental understanding of the 3D mid-frequency (1-20 kHz) acoustic environment associated with the mine countermeasures (MCM) problem in shallow water (SW) and very shallow water (VSW) and to develop efficient physics based propagation and scattering models incorporating aspect-dependent targets and seabed f...

Acoustical characteristics of a stage house and their effects on auditorium acoustics were investigated in a proscenium hall using computer simulation and scale models. The effects of a fly tower, the upper part of a stage house, were investigated with variable upper batten densities and covering materials. In addition, influences of the lower part of the stage house were examined by controllin...

To achieve enough variability for different performances, a number of new concert halls with secondary hard chambers coupled to the main floor have recently received positive evaluations. As a result, the acoustics of coupled spaces is drawing growing attention in architectural acoustics. In these coupled spaces, the sound energy decays with different exponential constants under certain conditi...