Using the HISQUI₂₉ to assess the sound quality levels of Spanish adults with unilateral cochlear implants and no contralateral hearing

To evaluate cochlear implant (CI) users’ self-reported level of sound quality and quality of life (QoL). Sound quality was self-evaluated using the hearing implant sound quality index (HISQUI₂₉). HISQUI₂₉ scores were further examined in three subsets. QoL was self-evaluated using the glasgow benefit inventory (GBI). GBI scores were further examined in three subsets. Possible correlations between the HISQUI₂₉ and GBI were explored. Additional possible correlations between these scores and subjects’ pure tone averages, speech perception scores, age at implantation, duration of hearing loss, duration of CI use, gender, and implant type were explored. Subjects derived a “moderate” sound quality level from their CI. Television, radio, and telephone tasks were easier in quiet than in background noise. 89 % of subjects reported their QoL benefited from having a CI. Mean total HISQUI₂₉ score significantly correlated with all subcategories of the GBI. Age at implantation inversely correlated with the total HISQUI₂₉ score and with television and radio understanding. Sentence in noise scores significantly correlated with all sound perception scores. Women had a better mean score in music perception and in telephone use than did men. CI users’ self-reported levels of sound quality significantly correlated with their QoL. Cochlear implantation had a beneficial impact on subjects’ QoL. Understanding speech is easier in quiet than in noise. Music perception remains a challenge for many CI users. The HISQUI₂₉ and the GBI can provide useful information about the everyday effects of future treatment modalities, rehabilitation strategies, and technical developments.