# Study of the effect of drill bits hardness, drilling machine operating parameters and rock mechanical parameters on noise level in hard rock drilling process

> Research article (Measurement, 2020) · cited 15× · AI/ML

**Wikidata**: [openalex:W3085262201](https://www.wikidata.org/wiki/openalex:W3085262201)  
**Source**: https://4ort.xyz/entity/study-of-the-effect-of-drill-bits-hardness-drilling-machine-operating-parameters-and-rock-mechanical-parameters-on-noise