SIGMOS

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SIGMOS (Signal Mean Opinion Score) is a subjective quality metric where human listeners rate the clarity and naturalness of audio signals.

A panel of listeners scores enhanced speech samples on a 1–5 scale, with higher scores indicating better quality.

It relies on human evaluation rather than algorithms, making it a gold standard for assessing perceptual audio quality.

Here at ai-coustics, we incorporate SIGMOS ratings to validate real-world listener experience, complementing objective metrics like PESQ.