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Factors Affecting the Variation of Maximum Speech Intelligibility in Patients With Sensorineural Hearing Loss Other Than Apparent Retrocochlear Lesions.

Yahata I, Kawase T, Miyazaki H, Takata Y, Yamauchi D, Nomura K, Katori Y - Clin Exp Otorhinolaryngol (2015)

Bottom Line: The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold - pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions.Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR.The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.

View Article: PubMed Central - PubMed

Affiliation: Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.

ABSTRACT

Objectives: To examine the relationship between speech intelligibilities among the similar level of hearing loss and threshold elevation of the auditory brainstem response (ABR).

Methods: The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold - pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions.

Results: Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR.

Conclusion: The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.

No MeSH data available.


Related in: MedlinePlus

Relationship between the four-frequency average of the pure tone air-conduction thresholds at 500, 1,000, 2,000, and 4,000 Hz (four-frequency PTA) and the maximum speech intelligibility. Significant correlation was observed between the PTA and maximum speech intelligibility (coefficients of correlation assessed by IBM SPSS ver. 21.0 are shown in the lower right). Inserted vertical dotted lines at 55 and 65 dB indicate the region in which the maximum speech intelligibilities appear to be relatively varied and further analysis was conducted as shown in Fig. 2. PTA, pure tone average; HL, hearing loss.
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Figure 1: Relationship between the four-frequency average of the pure tone air-conduction thresholds at 500, 1,000, 2,000, and 4,000 Hz (four-frequency PTA) and the maximum speech intelligibility. Significant correlation was observed between the PTA and maximum speech intelligibility (coefficients of correlation assessed by IBM SPSS ver. 21.0 are shown in the lower right). Inserted vertical dotted lines at 55 and 65 dB indicate the region in which the maximum speech intelligibilities appear to be relatively varied and further analysis was conducted as shown in Fig. 2. PTA, pure tone average; HL, hearing loss.

Mentions: The relationship between the four-frequency PTA and the maximum speech intelligibility is shown in Fig. 1. Although a significant correlation was generally observable between the PTA and maximum speech intelligibility, the maximum speech intelligibilities appear to vary greatly, especially around the PTA level of 60 dB. To examine the relationships between speech intelligibilities among patients with similar levels of SNHL and threshold elevation of the ABR variety, the maximum speech intelligibility is plotted as a function of the deterioration of the ABR (threshold difference between the ABR and average pure tone thresholds at 2,000 and 4,000 Hz) in Fig. 2A, for 12 selected ears from 10 patients with PTA equal or greater than 55 dB and less than 65 dB (Fig. 1). There was a significant relationship between maximum speech intelligibility and deterioration of the ABR. Significant levels of DPOAEs could not be obtained in any of the patients in whom DPOAEs were examined (Fig. 2A, closed circles). Auditory thresholds (250-4,000 Hz) of these 12 ears are presented in Fig. 2B.


Factors Affecting the Variation of Maximum Speech Intelligibility in Patients With Sensorineural Hearing Loss Other Than Apparent Retrocochlear Lesions.

Yahata I, Kawase T, Miyazaki H, Takata Y, Yamauchi D, Nomura K, Katori Y - Clin Exp Otorhinolaryngol (2015)

Relationship between the four-frequency average of the pure tone air-conduction thresholds at 500, 1,000, 2,000, and 4,000 Hz (four-frequency PTA) and the maximum speech intelligibility. Significant correlation was observed between the PTA and maximum speech intelligibility (coefficients of correlation assessed by IBM SPSS ver. 21.0 are shown in the lower right). Inserted vertical dotted lines at 55 and 65 dB indicate the region in which the maximum speech intelligibilities appear to be relatively varied and further analysis was conducted as shown in Fig. 2. PTA, pure tone average; HL, hearing loss.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4553345&req=5

Figure 1: Relationship between the four-frequency average of the pure tone air-conduction thresholds at 500, 1,000, 2,000, and 4,000 Hz (four-frequency PTA) and the maximum speech intelligibility. Significant correlation was observed between the PTA and maximum speech intelligibility (coefficients of correlation assessed by IBM SPSS ver. 21.0 are shown in the lower right). Inserted vertical dotted lines at 55 and 65 dB indicate the region in which the maximum speech intelligibilities appear to be relatively varied and further analysis was conducted as shown in Fig. 2. PTA, pure tone average; HL, hearing loss.
Mentions: The relationship between the four-frequency PTA and the maximum speech intelligibility is shown in Fig. 1. Although a significant correlation was generally observable between the PTA and maximum speech intelligibility, the maximum speech intelligibilities appear to vary greatly, especially around the PTA level of 60 dB. To examine the relationships between speech intelligibilities among patients with similar levels of SNHL and threshold elevation of the ABR variety, the maximum speech intelligibility is plotted as a function of the deterioration of the ABR (threshold difference between the ABR and average pure tone thresholds at 2,000 and 4,000 Hz) in Fig. 2A, for 12 selected ears from 10 patients with PTA equal or greater than 55 dB and less than 65 dB (Fig. 1). There was a significant relationship between maximum speech intelligibility and deterioration of the ABR. Significant levels of DPOAEs could not be obtained in any of the patients in whom DPOAEs were examined (Fig. 2A, closed circles). Auditory thresholds (250-4,000 Hz) of these 12 ears are presented in Fig. 2B.

Bottom Line: The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold - pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions.Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR.The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.

View Article: PubMed Central - PubMed

Affiliation: Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.

ABSTRACT

Objectives: To examine the relationship between speech intelligibilities among the similar level of hearing loss and threshold elevation of the auditory brainstem response (ABR).

Methods: The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold - pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions.

Results: Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR.

Conclusion: The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.

No MeSH data available.


Related in: MedlinePlus