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Difference Limen for Intensity Following Monaural Use of Hearing Aid

Author(s): Mohanna Javanbakht | Nariman Rahbar | Mohammad Kamali

Journal: Audiology
ISSN 1735-1936

Volume: 20;
Issue: 2;
Start page: 1;
Date: 2011;
Original page

Keywords: Difference Limen for Intensity | Symmetrical Sensorineural Hearing Loss | Monaural Use of Hearing Aid | Functional Plasticity

Background and Aim: It is well established that adult sensory systems can reorganize following environmental changes; hearing aid stimulates a deprived auditory system resulting in changes in received stimuli and may be capable of inducing changes within the auditory system abilities such as difference limen for intensity. Hearing aid fitting induces perceptual and physiological modifications. The present study was conducted to evaluate the effects of hearing aid use on the intensity discrimination performance.Methods: The study group consisted of 30 monaural users of hearing aid with symmetrical moderate or moderately severe sensorineural hearing loss in both ears (15 males, 15 females), aged 45-65 years old with the mean of 57.73 and SD of 8.12 years. difference limen for intensity was measured at two frequencies, 500 Hz, 2000 Hz, and two intensity levels (10 dB SL, 40 dB SL). The results of fitted ears were compared with not-fitted ones.Results: The results of the study showed better difference limen for intensity scores at high frequency and high intensity levels. A significant lower difference limen for intensity in fitted ears was observed compared with not-fitted ears (p
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