title: Temporal modulation transfer functions for listeners with real and simulated hearing loss.
abstract: A functional simulation of hearing loss was evaluated in its ability to reproduce the temporal modulation transfer functions (TMTFs) for nine listeners with mild to profound sensorineural hearing loss. Each hearing loss was simulated in a group of three age-matched normal-hearing listeners through spectrally shaped masking noise or a combination of masking noise and multiband expansion. TMTFs were measured for both groups of listeners using a broadband noise carrier as a function of modulation rate in the range 2 to 1024 Hz. The TMTFs were fit with a lowpass filter function that provided estimates of overall modulation-depth sensitivity and modulation cutoff frequency. Although the simulations were capable of accurately reproducing the threshold elevations of the hearing-impaired listeners, they were not successful in reproducing the TMTFs. On average, the simulations resulted in lower sensitivity and higher cutoff frequency than were observed in the TMTFs of the hearing-impaired listeners. Discrepancies in performance between listeners with real and simulated hearing loss are possibly related to inaccuracies in the simulation of recruitment.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Desloge
authors.forename: Charlotte M
authors.initials: CM
authors.lastname: Reed
authors.forename: Louis D
authors.initials: LD
authors.lastname: Braida
authors.forename: Zachary D
authors.initials: ZD
authors.lastname: Perez
authors.forename: Lorraine A
authors.initials: LA
authors.lastname: Delhorne
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D001301:Audiometry, Pure-Tone; D001306:Auditory Pathways / Q000503:physiopathology*; D001307:Auditory Perception; D001309:Auditory Threshold; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise / Q000009:adverse effects*; D010470:Perceptual Masking; D019986:Persons with Hearing Disabilities / Q000523:psychology*; D011571:Psychoacoustics; D015203:Reproducibility of Results; D013997:Time Factors; D055815:Young Adult