# Low-cost measurement of face mask efficacy for filtering expelled droplets during speech

> Research article (Science Advances, 2020) · cited 316× · AI/ML

**Wikidata**: [openalex:W3048140877](https://www.wikidata.org/wiki/openalex:W3048140877)  
**Source**: https://4ort.xyz/entity/low-cost-measurement-of-face-mask-efficacy-for-filtering-expelled-droplets-during-speech