# An unsupervised machine learning technique to identify knock from a knock signal time-frequency analysis

> Research article (Measurement, 2023) · cited 13× · AI/ML

**Wikidata**: [openalex:W4323322183](https://www.wikidata.org/wiki/openalex:W4323322183)  
**Source**: https://4ort.xyz/entity/an-unsupervised-machine-learning-technique-to-identify-knock-from-a-knock-signal-time-frequency-analysis