# Covert voice over internet protocol communications based on spatial model

> Research article (Science China Technological Sciences, 2015) · cited 16× · AI/ML

**Wikidata**: [openalex:W2253372807](https://www.wikidata.org/wiki/openalex:W2253372807)  
**Source**: https://4ort.xyz/entity/covert-voice-over-internet-protocol-communications-based-on-spatial-model