# Sub-ppb level HCN photoacoustic sensor employing dual-tube resonator enhanced clamp-type tuning fork and U-net neural network noise filter

> Research article (Photoacoustics, 2024) · cited 62× · AI/ML

**Wikidata**: [openalex:W4400110020](https://www.wikidata.org/wiki/openalex:W4400110020)  
**Source**: https://4ort.xyz/entity/sub-ppb-level-hcn-photoacoustic-sensor-employing-dual-tube-resonator-enhanced-clamp-type-tuning-fork-and-u-net-neural-ne