@inproceedings{sgem2020s03018,
  title = {HEARING PROTECTION DEVICES WITH ACTIVE ATTENUATION CONTROL FOR QUARRY EMPLOYMENT},
  author = {Guido Alfaro Degan and Diego Annesi and Andrea Antonucci and Gianluca Coltrinari and Dario Lippiello and Pietro Nataletti},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Science and Technologies in Geology, Exploration And Mining},
  year = {2020},
  pages = {135-144},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2020/1.2/s03.018}
}