1. About noise in general -- 2. Application of noise monitoring for mining equipments -- 3. Rock mechanics : application of sound level -- 4. Application of acoustic emission and equivalent sound levels in the geotechnical fields -- 5. Equipment for drilling, measurement of sound, and physico-mechanical properties of rocks -- 6. Measurement of rock properties and sound level -- 7. Regression modeling -- 8. Application of artificial neural networks -- 9. Case study : sound level versus rock properties -- 10. Summary and suggestions for further work.