engleski

Effects of Similar Multiple Signals on Intelligibility and Localization of a Referent Signal

Interference signals make difficult to understand specific words from a referent source, or to localize the direction of a certain referent signal. Reverberant spaces add reflections to the sound field. A number of experiments were made using binaural hearing in order to find out how signals of same type mask the content of the referent signal, or lower the intelligibility of speech. Different signals were used: spoken sentences, logatomes, broadband white noise, frequency limited pink noise. There was always a referent sound source: a referent speaker, amplitude modulated white noise, or filtered pink noise of highest frequency. The number of competitive signals was up to seven. Some of the experiments were done in different rooms with different acoustic finishing and background noise, thus having different reflection pattern behaviour from a sound source on the listener spot. The results were compared and the fall in intelligibility and localization precision was measured influenced by the differences in number of sources, their position and their distance, as well as their loudness.

sound source localization; reverberant space; intelligibility

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