@misc{indiciae6ed5e9947e5b,
  title = {Hearing-aid fitting protocol.},
  author = {L J Upfold and M F Smither},
  year = {1981},
  doi = {10.3109/03005368109081435},
  url = {https://pubmed.ncbi.nlm.nih.gov/7296096/},
  note = {Source identifier: 7296096}
}