Reverberation tail concatenation

The study of binaural reverberation (project "Audibility of Characteristics in the Reverberation Tail of Binaural Room Impulse Responses") requires the signal concatenation of 1) the beginning of the binaural room impulse responses and 2) the tails, for the different source and receiver settings. The characteristics between the different tails are so different that simply replacing one reverberation tail with another will be audible. This project aims to find the signal processing technique that minimizes the difference among the tail characteristics without changing the significant structure of the tail in the microscopic level. The processing technique deals with the impulse response truncation, tail suppression of the late, noisy part, energy preservation, and cross fading. A formalized listening test including eight subjects was conducted. The results suggest that methods of energy preservation shall be used with caution, in particular for late concatenation times. The results also suggested that the objective measure C50 correlated with audibility. (Ph. D. scholarship by the Thai government). Supported by STVF/FTP.