title: Categorization of common sounds by cochlear implanted and normal hearing adults.
abstract: Auditory categorization involves grouping of acoustic events along one or more shared perceptual dimensions which can relate to both semantic and physical attributes. This process involves both high level cognitive processes (categorization) and low-level perceptual encoding of the acoustic signal, both of which are affected by the use of a cochlear implant (CI) device. The goal of this study was twofold: I) compare the categorization strategies of CI users and normal hearing listeners (NHL) II) investigate if any characteristics of the raw acoustic signal could explain the results. 16 experienced CI users and 20 NHL were tested using a Free-Sorting Task of 16 common sounds divided into 3 predefined categories of environmental, musical and vocal sounds. Multiple Correspondence Analysis (MCA) and Hierarchical Clustering based on Principal Components (HCPC) show that CI users followed a similar categorization strategy to that of NHL and were able to discriminate between the three different types of sounds. However results for CI users were more varied and showed less inter-participant agreement. Acoustic analysis also highlighted the average pitch salience and average autocorrelation peak as being important for the perception and categorization of the sounds. The results therefore show that on a broad level of categorization CI users may not have as many difficulties as previously thought in discriminating certain kinds of sound; however the perception of individual sounds remains challenging.
authors.affiliation: Université de Toulouse, CerCo UMR 5549 CNRS, Université Paul Sabatier, Toulouse, France; Université de Toulouse, CerCo UMR 5549 CNRS, Faculté de Médecine de Purpan, Toulouse, France; Advanced Bionics SARL, France.
authors.forename: E
authors.initials: E
authors.lastname: Collett
authors.affiliation: Université de Toulouse, CerCo UMR 5549 CNRS, Université Paul Sabatier, Toulouse, France; Université de Toulouse, CerCo UMR 5549 CNRS, Faculté de Médecine de Purpan, Toulouse, France; Service d'Oto-Rhino-Laryngologie et Oto-Neurologie, Hopital Purpan, Toulouse, France.
authors.forename: M
authors.initials: M
authors.lastname: Marx
authors.affiliation: Université de Toulouse, CLLE UMR 5263, CNRS, UT2J, Université de Toulouse Jean-Jaurès, Toulouse, France.
authors.forename: P
authors.initials: P
authors.lastname: Gaillard
authors.affiliation: Université de Toulouse, CerCo UMR 5549 CNRS, Université Paul Sabatier, Toulouse, France; Université de Toulouse, CerCo UMR 5549 CNRS, Faculté de Médecine de Purpan, Toulouse, France; Service d'Oto-Rhino-Laryngologie et Oto-Neurologie, Hopital Purpan, Toulouse, France.
authors.forename: B
authors.initials: B
authors.lastname: Roby
authors.affiliation: Service d'Oto-Rhino-Laryngologie et Oto-Neurologie, Hopital Purpan, Toulouse, France.
authors.forename: B
authors.initials: B
authors.lastname: Fraysse
authors.affiliation: Université de Toulouse, CerCo UMR 5549 CNRS, Université Paul Sabatier, Toulouse, France; Université de Toulouse, CerCo UMR 5549 CNRS, Faculté de Médecine de Purpan, Toulouse, France; Service d'Oto-Rhino-Laryngologie et Oto-Neurologie, Hopital Purpan, Toulouse, France.
authors.forename: O
authors.initials: O
authors.lastname: Deguine
authors.affiliation: Université de Toulouse, CerCo UMR 5549 CNRS, Université Paul Sabatier, Toulouse, France; Université de Toulouse, CerCo UMR 5549 CNRS, Faculté de Médecine de Purpan, Toulouse, France. Electronic address: Pascal.barone@cerco.ups-tlse.fr.
authors.forename: P
authors.initials: P
authors.lastname: Barone
mesh_terms: D000161:Acoustic Stimulation; D000162:Acoustics; D000328:Adult; D000368:Aged; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D016000:Cluster Analysis; D019929:Cochlear Implantation; D003054:Cochlear Implants; D003627:Data Interpretation, Statistical; D003638:Deafness / Q000503:physiopathology* / Q000628:therapy; D005260:Female; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D025341:Principal Component Analysis; D013016:Sound; D013997:Time Factors; D014831:Voice; D055815:Young Adult
keywords: Auditory categorization; Cochlear implant; Free-sorting; Hierarchical clustering; Multiple Correspondence Analysis