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Articles 1 - 11 of 11
Full-Text Articles in Medicine and Health Sciences
Bone Conduction Transmission And Head‐Shadow Effects For Unilateral Hearing Losses Fit With Transcranial Cic Hearing Aids, Marc A. Fagelson, Colleen Noe, Jennifer Blevins, Owen Murnane
Bone Conduction Transmission And Head‐Shadow Effects For Unilateral Hearing Losses Fit With Transcranial Cic Hearing Aids, Marc A. Fagelson, Colleen Noe, Jennifer Blevins, Owen Murnane
Owen D. Murnane
Bone conduction transmission and head‐shadow effects were determined with transcranial completely‐in‐the‐canal (TCCIC) CROS hearing aids. Five subjects with documented profound unilateral hearing loss and experience with traditional CROS/BICROS fittings (TCROS) were tested with a CIC hearing aid placed in their poorer ear. Peak SPL was measured at the tympanic membrane and ranged from 105–115 dB SPL at 2000 Hz. Pure‐tone crossover thresholds and functional gain tested at frequencies from 250–8000 Hz varied considerably more than the SPL measures. The pure‐tone results indicated that sensitivity in the better ear was moderately associated with functional gain across frequency. Speech recognition was then …
Characteristics Of Speech (Part 1) And Language (Part 2) For Hearing Devices (Aids), Earl E. Johnson
Characteristics Of Speech (Part 1) And Language (Part 2) For Hearing Devices (Aids), Earl E. Johnson
Earl E. Johnson
No abstract provided.
Better Hearing Devices And Many Forms Of Delivery, Earl E. Johnson
Better Hearing Devices And Many Forms Of Delivery, Earl E. Johnson
Earl E. Johnson
No abstract provided.
Presbyacusis A Review, Balasubramanian Thiagarajan
Presbyacusis A Review, Balasubramanian Thiagarajan
Balasubramanian Thiagarajan
Life expectancy of Humans is on the rise. World’s human population is aging rapidly. According to a report of US census Bureau nearly 24% of current world population is above the age of 50. This is a phenomenal number. Hearing loss due to degenerative process is rather common in old age. Presbyacusis is defined as a progressive bilateral symmetrical age related sensorineural hearing loss. The hearing loss is confined to higher frequencies. This causes a greater burden on them considering the fact that they already have failing eyesight. This article attempts to review the current scenario pertaining to Presbyacusis with …
Time Course Of Speech Changes In Response To Unanticipated Short-Term Changes In Hearing State, Joseph Perkell, Harlan Lane, Margaret Denny, Melanie Matthies, Mark Tiede, Majid Zandipour, Jennell Vick, Ellen Burton
Time Course Of Speech Changes In Response To Unanticipated Short-Term Changes In Hearing State, Joseph Perkell, Harlan Lane, Margaret Denny, Melanie Matthies, Mark Tiede, Majid Zandipour, Jennell Vick, Ellen Burton
Harlan Lane
The timing of changes in parameters of speech production was investigated in six cochlear implant users by switching their implant microphones off and on a number of times in a single experimental session. The subjects repeated four short, two-word utterances, /dV₁n#SV₂d/ (S=/s/ or /ʃ/), in quasi-random order. The changes between hearing and nonhearing states were introduced by a voice-activated switch at V1 onset. "Postural" measures were made of vowel sound pressure level (SPL), duration, F0; contrast measures were made of vowel separation (distance between pair members in the formant plane) and sibilant separation (difference in spectral means). Changes in parameter …
Effects Of Masking Noise On Vowel And Sibilant Contrasts In Normal-Hearing Speakers And Postlingually Deafened Cochlear Implant Users, Joseph Perkell, Margaret Denny, Harlan Lane, Frank Guenther, Melanie Matthies, Mark Tiede, Jennell Vick, Majid Zandipour, Ellen Burton
Effects Of Masking Noise On Vowel And Sibilant Contrasts In Normal-Hearing Speakers And Postlingually Deafened Cochlear Implant Users, Joseph Perkell, Margaret Denny, Harlan Lane, Frank Guenther, Melanie Matthies, Mark Tiede, Jennell Vick, Majid Zandipour, Ellen Burton
Harlan Lane
The role of auditory feedback in speech production was investigated by examining speakers' phonemic contrasts produced under increases in the noise to signal ratio (N/S). Seven cochlear implant users and seven normal-hearing controls pronounced utterances containing the vowels /i/, /u/, /ε/ and /æ/ and the sibilants /s/ and /ʃ/ while hearing their speech mixed with noise at seven equally spaced levels between their thresholds of detection and discomfort. Speakers' average vowel duration and SPL generally rose with increasing N/S. Average vowel contrast was initially flat or rising; at higher N/S levels, it fell. A contrast increase is interpreted as reflecting …
A Preliminary Study Of The Effects Of Cochlear Implants On The Production Of Sibilants, Melanie L. Matthies, Mario A. Svirsky, Harlan L. Lane, Joseph S. Perkell
A Preliminary Study Of The Effects Of Cochlear Implants On The Production Of Sibilants, Melanie L. Matthies, Mario A. Svirsky, Harlan L. Lane, Joseph S. Perkell
Harlan Lane
The potential influence of auditory information in the production of /s/ and /ʃ/ was explored for postlingually deafened adults with four-channel Ineraid cochlear implants. Analyses of the spectra of the sibilant sounds were compared for speech obtained prior to implant activation, after early implant use and after 6 months of use. In addition, the output of the Ineraid device (measured at each of the four electrodes) was analyzed with pre- and postactivation speech samples to explore whether the speech production changes were potentially audible to the cochlear-implant user. Results indicated that subjects who showed abnormally low or incorrect contrast between …
Changes In Voice-Onset Time In Speakers With Cochlear Implants, Harlan Lane, Jane Wozniak, Joseph Perkell
Changes In Voice-Onset Time In Speakers With Cochlear Implants, Harlan Lane, Jane Wozniak, Joseph Perkell
Harlan Lane
Voice-onset time (VOT) and syllable duration were measured for the English plosives in /Cɑd/ (C=consonant) context spoken by four postlingually deafened recipients of multichannel (Ineraid) cochlear implants. Recordings were made of their speech before, and at intervals following, activation of the speech processors of their implants. Three patients reduced mean syllable duration following activation. Using measures of VOT and syllable duration from speakers with normal hearing [Volaitis and Miller, J. Acoust. Soc. Am. 92, 723–735 (1992)] and from the subjects of this study, VOT is shown to vary approximately linearly with syllable duration over the ranges produced here. Therefore, the …
Effects Of Short-Term Auditory Deprivation On Speech Production In Adult Cochlear Implant Users, Mario A. Svirsky, Harlan Lane, Joseph S. Perkell, Jane Wozniak
Effects Of Short-Term Auditory Deprivation On Speech Production In Adult Cochlear Implant Users, Mario A. Svirsky, Harlan Lane, Joseph S. Perkell, Jane Wozniak
Harlan Lane
Speech production parameters of three postlingually deafened adults who use cochlear implants were measured: after 24 h of auditory deprivation (which was achieved by turning the subject's speech processor off); after turning the speech processor back on; and after turning the speech processor off again. The measured parameters included vowel acoustics [F1, F2, F0, sound-pressure level (SPL), duration and H1–H2, the amplitude difference between the first two spectral harmonics, a correlate of breathiness] while reading word lists, and average airflow during the reading of passages. Changes in speech processor state (on-to-off or vice versa) were accompanied by numerous changes in …
Perception And Production Of /R/ Allophones Improve With Hearing From A Cochlear Implant, Melanie L. Matthies, Frank H. Guenther, Margaret Denny, Joseph S. Perkell, Ellen Burton, Jennell Vick, Harlan Lane, Mark Tiede, Majid Zandipour
Perception And Production Of /R/ Allophones Improve With Hearing From A Cochlear Implant, Melanie L. Matthies, Frank H. Guenther, Margaret Denny, Joseph S. Perkell, Ellen Burton, Jennell Vick, Harlan Lane, Mark Tiede, Majid Zandipour
Harlan Lane
Tongue shape can vary greatly for allophones of /r/ produced in different phonetic contexts but the primary acoustic cue used by listeners, lowered F3, remains stable. For the current study, it was hypothesized that auditory feedback maintains the speech motor control mechanisms that are constraining acoustic variability of F3 in /r/; thus the listener's percept remains /r/ despite the range of articulatory configurations employed by the speaker. Given the potential importance of auditory feedback, postlingually deafened speakers should show larger acoustic variation in /r/ allophones than hearing controls, and auditory feedback from a cochlear implant could reduce that variation over …
Interactions Of Speaking Condition And Auditory Feedback On Vowel Production In Postlingually Deaf Adults With Cochlear Implants, Lucie Ménard, Marek Polak, Margaret Denny, Ellen Burton, Harlan Lane, Melanie Matthies, Nicole Marrone, Joseph Perkell, Mark Tiede, Jennell Vick
Interactions Of Speaking Condition And Auditory Feedback On Vowel Production In Postlingually Deaf Adults With Cochlear Implants, Lucie Ménard, Marek Polak, Margaret Denny, Ellen Burton, Harlan Lane, Melanie Matthies, Nicole Marrone, Joseph Perkell, Mark Tiede, Jennell Vick
Harlan Lane
This study investigates the effects of speaking condition and auditory feedback on vowel production by postlingually deafened adults. Thirteen cochlear implant users produced repetitions of nine American English vowels prior to implantation, and at one month and one year after implantation. There were three speaking conditions (clear, normal, and fast), and two feedback conditions after implantation (implant processor turned on and off). Ten normal-hearing controls were also recorded once. Vowel contrasts in the formant space (expressed in mels) were larger in the clear than in the fast condition, both for controls and for implant users at all three time samples. …