Abstract
In contrast with previous research focusing on cochlear implants, this study examined the speech performance of hearing aid users with conductive (n = 11), mixed (n = 10), and sensorineural hearing loss (n = 7) and compared it with the speech of hearing control. Speech intelligibility was evaluated by computing the vowel space area defined by the Mandarin Chinese corner vowels /a, u, i/. The acoustic differences between the vowels were assessed using the Euclidean distance. The results revealed that both the conductive and mixed hearing loss groups exhibited a reduced vowel working space, but no significant difference was found between the sensorineural hearing loss and normal hearing groups. An analysis using the Euclidean distance further showed that the compression of vowel space area in conductive hearing loss can be attributed to the substantial lowering of the second formant of /i/. The differences in vowel production between groups are discussed in terms of the occlusion effect and the signal transmission media of various hearing devices.
Highlights
Data Availability Statement: All relevant data are within the paper and its Supporting Information files
A significant difference was observed between the conductive hearing loss (COND) and sensorineural hearing loss (SNHL) groups (H(2) = 29.267, p = .011), indicating that the COND group was younger than the SNHL group
The main aim of the present research was to explore whether speakers with different types of hearing loss produce vowels differently than speakers with normal hearing
Summary
The main aim of the present research was to explore whether speakers with different types of hearing loss produce vowels differently than speakers with normal hearing
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