The Evolution of the Mean Opinion Scale: From MOS-R to MOS-X2

The Mean Opinion Scale (MOS) is a standardized questionnaire used to assess synthetic speech. The quality of synthetic speech strongly affects the user experience of working with conversational systems, with listeners making rapid and unconscious judgments of the speaker’s personality, so it’s important to have standardized methods for its assessment. In an earlier article, we

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What Is the Mean Opinion Scale (MOS)?

The quality of the electronic transmission of the human voice has come a long way since Bell summoned Watson. But even with all the advancement in technology, “Can you hear me now?” is still part of our modern lexicon. Voice—both human and digital—plays an increasingly important role in interactions with our devices. But before you

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Three Questionnaires for Measuring Voice Interaction Experiences

Human: Computer, can you recognize speech? Computer: I think you said, can you wreck a nice beach? Both the quality of synthesized speech and the capability of communicating with a computer using your voice have come a long way since the debut of this technology in the 1970s. One of the most famous synthetic voices

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