A new verification of the Speech Transmission Index for the English language

Publication date: Available online 19 October 2018Source: Speech CommunicationAuthor(s): Lorenzo Morales, Francis F. LiAbstractThe speech transmission index (STI) is one of the most widely used and standardized methods for objective prediction of speech intelligibility of transmission channels. The original verification of the relationship between the STI and the intelligibility for the English language was published in 1987. The methodology employed then for the listening tests and the different input spectrum recommended today by the current STI method suggest that the relationship STI vs speech intelligibility needs to be verified for the English language. This paper presents a new verification of the current STI for the English language with binaural listening and the speech materials ...

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