This study examines the relationship between a temporal masking effect and cochlear hearing impairment. The threshold level of a long-duration broadband masker needed to mask a short-duration tonal signal was measured for signals presented 2 ms (short-delay) or 202 ms (long-delay condition) after masker onset. The difference between these thresholds is the temporal effect. In two previous studies with normal-hearing listeners, estimates of gain of the cochlear active process derived from such data suggested a decrease in gain during the course of the masker. This hypothesis was further examined in the present study by testing listeners with mild to moderate cochlear hearing impairment. Results are consistent with a decrease in gain in the short-delay condition with increasing hearing impairment, and also less change in gain with increasing hearing impairment.
Results show that a short-term study-abroad program with a service-learning component can be a mechanism for students to enhance academic and civic learning, specifically cultural competence and clinical skills. Sustainability of programs is a challenge that needs to be addressed.
Purpose
To evaluate the referral and follow-up procedures at a university clinic to determine whether the early intervention program is achieving the goals of diagnosis of hearing loss by 3 months, amplification within 1 month of diagnosis, and intervention services by 6 months, as outlined in the Joint Committee on Infant Hearing (JCIH; 2007) position statement.
Method
Files for 142 infants were examined, and the following data were collected from each file: date of birth, birth hospital, hometown, parents' ages, ethnicity, nursery status (well baby or neonatal intensive care unit), medical history, age at initial evaluation and at diagnosis, results of evaluation(s), and age at hearing aid fitting and start of early intervention services.
Results
Results revealed that 17% of infants were older than 3 months at the initial evaluation, and 18% of infants who needed further evaluation were lost to follow-up. None of the infants identified with hearing loss received amplification within 1 month of diagnosis or early intervention services by the age of 6 months.
Conclusions
The findings provide further evidence of the challenges of early intervention programs as stated by the JCIH (2007), and they emphasize the importance of communication between practitioners and implementation of monitoring systems and checks and balances to improve the efficacy of early intervention programs.
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