Acoustic characteristics of speech in Fante speakers with hearing loss
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Acoustic characteristics of speech in Fante speakers with hearing loss
The study compared the acoustic characteristics of speech in Fante speaking school children with moderately severe to profound sensorineural hearing loss to those with normal hearing. Method: Participants were Ghanaian students aged of 10 to 20, with or without hearing loss. Speech samples of monosyllabic words were recorded in an acoustically treated room. Analysis focused on the duration, voice onset time (VOT), and intensity of plosive sounds. Results: Consonant production of participants varied between individuals with and without hearing loss, especially for specific plosives. Participants with normal hearing had slightly longer voicing patterns compared to those with hearing loss. Participants with hearing loss consistently produced speech with higher maximum intensity values. Notably, /k/, /b/, and /g/ were observed to have the highest intensity values among the sounds. Conclusion: Hearing loss significantly alters the acoustic properties of speech. Individuals with moderately severe to profound sensorineural hearing loss exhibit distinct patterns in speech production that affect VOT, and intensity of consonant articulation.
The policy implications of this study are that:
- Early Hearing Detection and Intervention (EHDI) must be enhanced
- It is important to pay attention to early hearing detection and intervention. This is because the findings show that hearing loss alters speech acoustics and thus early detection and intervention for children is very much needed.
- The findings also imply that routine newborn and school-entry hearing screening ought to be given much focus to reduce the long-term effects of hearing loss on speech development.
- Access to speech-language and audiology services should be improved
- The differences in VOT, intensity, and consonant production indicate that children with hearing loss require specialized speech and language intervention and policy should provide for that.
- Policy should increase the availability of speech-language pathologists and audiologists in schools, hospitals, and community health facilities, especially outside major urban centers.
- Develop Language-Specific Intervention Programs
- Because this study provides evidence from Fante-speaking children, it demonstrates that speech characteristics associated with hearing loss should be assessed within the linguistic context of the child's native language.
- National rehabilitation programs should develop assessment tools and therapy materials in Ghanaian languages rather than relying solely on English-based protocols.
- Support Inclusive Education
- Schools should receive resources to support students with hearing loss, including assistive listening devices, speech therapy, teacher training, and classroom accommodations.
- Teacher-training curricula should recognize speech characteristics associated with hearing loss and adapt instructional strategies accordingly.
- Improve Hearing Aid and Cochlear Implant Services
- The altered speech production patterns suggest the need for timely fitting, regular maintenance, and monitoring of hearing devices.
- Policies should increase financial support for hearing technologies and follow-up rehabilitation services.
- Promote Objective Speech Monitoring
- Acoustic measures such as VOT, speech duration, and intensity can serve as objective indicators of speech outcomes.
- Clinical guidelines could incorporate acoustic analysis into routine assessment to monitor intervention effectiveness.
Contribution to Policy
This study provides local evidence on how sensorineural hearing loss affects speech production in Ghanaian children, addressing a gap in African speech and hearing research. It also Supports evidence-based planning for hearing healthcare, speech therapy, and special education services. The study also informs the development of national clinical guidelines for speech assessment and rehabilitation that include acoustic analysis.
Another contribution policy is that it encourages investment in indigenous-language research, ensuring that intervention policies are culturally and linguistically appropriate. The study also guides curriculum development for training audiologists, speech-language therapists, and teachers by highlighting the acoustic features most affected by hearing loss. Also, this study supports resource allocation toward early intervention programs, assistive technologies, and specialized personnel in schools and health facilities.
Practical Policy Recommendation
Based on these findings, policymakers should consider implementing a comprehensive national strategy that:
- expands early hearing screening,
- improves access to hearing technology and rehabilitation,
- integrates speech-language services into school health programs,
- develops standardized acoustic assessment protocols for Ghanaian languages, and
- invests in training professionals capable of delivering culturally and linguistically appropriate intervention.
Such measures would help reduce communication barriers, improve educational outcomes, and enhance the social participation of children with hearing loss.
In summary, the study demonstrates that hearing loss leads to measurable changes in the acoustic properties of Fante speech, particularly in voice onset time and consonant intensity. These findings provide a strong evidence base for policies that prioritize early detection, language-specific rehabilitation, inclusive education, and expanded speech and hearing services in Ghana.