# Sweep-to-Unlock: Fingerprinting Smartphones Based on Loudspeaker Roll-Off Characteristics

> Research article (IEEE Transactions on Mobile Computing, 2021) · cited 11× · AI/ML

**Wikidata**: [openalex:W3206493210](https://www.wikidata.org/wiki/openalex:W3206493210)  
**Source**: https://4ort.xyz/entity/sweep-to-unlock-fingerprinting-smartphones-based-on-loudspeaker-roll-off-characteristics