Changes in sound pressure and fundamental frequency contours following changes in hearing status. 1997

H Lane, and J Wozniak, and M Matthies, and M Svirsky, and J Perkell, and M O'Connell, and J Manzella
Massachusetts Institute of Technology, Research Laboratory of Electronics, Cambridge 02139, USA.

Sound-pressure level (SPL) and fundamental frequency (F0) contours were obtained from four postlingually deafened adults who received cochlear implants and from a subject with Neurofibromatosis-2 (NF2) who had her hearing severely reduced following surgery to remove an auditory-nerve tumor and to implant an auditory brainstem implant. SPL and F0 contours for each phrase in passages read before and after changes in hearing were averaged over repeated readings and then normalized with respect to the highest SPL or F0 value in the contour. The regularity of each average contour was measured by calculating differences between successive syllable means and averaging the absolute values of these differences. With auditory feedback made available, the cochlear implant user with the least contour variation preimplant showed no change but all of the remaining speakers produced less variable F0 contours and three also produced less variable SPL contours. In complementary fashion, when the NF2 speaker had her auditory feedback severely reduced, she produced more variable F0 and SPL contours. The results are interpreted as supporting a dual-process theory of the role of auditory feedback in speech production, according to which one role of self-hearing is to monitor transmission conditions, leading the speaker to make changes in speech postures aimed at maintaining intelligibility.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D003054 Cochlear Implants Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation. Auditory Prosthesis,Cochlear Prosthesis,Implants, Cochlear,Auditory Prostheses,Cochlear Implant,Cochlear Prostheses,Implant, Cochlear,Prostheses, Auditory,Prostheses, Cochlear,Prosthesis, Auditory,Prosthesis, Cochlear
D003638 Deafness A general term for the complete loss of the ability to hear from both ears. Deafness Permanent,Hearing Loss Permanent,Prelingual Deafness,Deaf Mutism,Deaf-Mutism,Deafness, Acquired,Hearing Loss, Complete,Hearing Loss, Extreme,Acquired Deafness,Complete Hearing Loss,Deafness, Prelingual,Extreme Hearing Loss,Permanent, Deafness,Permanent, Hearing Loss,Permanents, Deafness
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016518 Neurofibromatosis 2 An autosomal dominant disorder characterized by a high incidence of bilateral acoustic neuromas as well as schwannomas (NEURILEMMOMA) of other cranial and peripheral nerves, and other benign intracranial tumors including meningiomas, ependymomas, spinal neurofibromas, and gliomas. The disease has been linked to mutations of the NF2 gene (GENES, NEUROFIBROMATOSIS 2) on chromosome 22 (22q12) and usually presents clinically in the first or second decade of life. Neurofibromatosis, Acoustic, Bilateral,Neurofibromatosis, Central, NF2,Neuroma, Acoustic, Bilateral,Schwannoma, Acoustic, Bilateral,Acoustic Neurinoma, Bilateral,Acoustic Schwannomas, Bilateral,Bilateral Acoustic Neurofibromatosis,Central Neurofibromatosis,Familial Acoustic Neuromas,NF2 (Neurofibromatosis 2),Neurofibromatosis II,Neurofibromatosis Type 2,Neurofibromatosis Type II,Neurofibromatosis, Central NF2,Neurofibromatosis, Central, NF 2,Neurofibromatosis, Type 2,Neurofibromatosis, Type II,Neurofibromatosis, central type,Acoustic Neurinomas, Bilateral,Acoustic Neurofibromatoses, Bilateral,Acoustic Neurofibromatosis, Bilateral,Acoustic Neuroma, Familial,Acoustic Neuromas, Familial,Acoustic Schwannoma, Bilateral,Bilateral Acoustic Neurinoma,Bilateral Acoustic Neurinomas,Bilateral Acoustic Neurofibromatoses,Bilateral Acoustic Schwannoma,Bilateral Acoustic Schwannomas,Central NF2 Neurofibromatoses,Central NF2 Neurofibromatosis,Central Neurofibromatoses,Familial Acoustic Neuroma,NF2s (Neurofibromatosis 2),Neurinoma, Bilateral Acoustic,Neurinomas, Bilateral Acoustic,Neurofibromatoses, Bilateral Acoustic,Neurofibromatoses, Central,Neurofibromatoses, Central NF2,Neurofibromatoses, Type 2,Neurofibromatoses, Type II,Neurofibromatosis IIs,Neurofibromatosis, Bilateral Acoustic,Neurofibromatosis, Central,Neuroma, Familial Acoustic,Neuromas, Familial Acoustic,Schwannoma, Bilateral Acoustic,Schwannomas, Bilateral Acoustic,Type 2 Neurofibromatoses,Type 2 Neurofibromatosis,Type II Neurofibromatoses,Type II Neurofibromatosis
D017668 Age of Onset The age, developmental stage, or period of life at which a disease or the initial symptoms or manifestations of a disease appear in an individual. Age-at-Onset,Age at Onset,Onset Age

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