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純音聽力閾質與華語語音聽辨能力之聽耳優勢

Ear Advantage for Pure Tone Threshold and Mandarin Speech Discrimination Ability

摘要


背景:歐美國民之週邊聽覺功能與語音聽辨能力存在著右耳優勢之情形,但此現象尚未在華語系國民中被確認。另外,週邊聽覺功能和華語語音聽辨能力之間的關聯性也不清楚。因此,本研究將探討週邊聽覺功能與華語語音聽辨能力脂聽耳優勢與關聯性。方法:回溯性分析本院門診215名聽力正常或患有感覺神經性聽損且說華語的台灣人之聽力檢查結果,分別比較兩耳之純音聽力閾值或華語語音辨識分數之優勢性與關聯性。結果:純音聽力檢查結果顯示,右耳比左耳較佳之情形為39.5%,雙耳相當之情形為10.7%,左耳比右耳較佳之情形為49.8%。而華語語音聽辨檢查顯示,右耳比左耳較佳之比例為36.7%,雙耳相當為31.7%,左耳比右耳較佳之比例為31.6%。各耳純音聽力閾值和華語語音聽辨分數之負相關性,不論有無校正年齡、性別、全身性慢性疾病、語音接受閾值等因子,只存在於說華語台灣女性之左耳。另外,兩耳華語語音聽辨分數之相對嚴重度與兩耳純音聽力閾值之相對嚴重度,只有29.3%國民的數據是相符合的。結論:說華語台灣人的週邊聽覺功能與華語語音聽辨能力似乎無右耳優勢聽力之現象,而且純音聽力閾值和華語語音聽辨分數之負相關,只存在於說華語台灣女性之左耳。另外,兩耳之華語語音聽辨能力相對嚴重度或週邊聽覺功能相對嚴重度一致性很低。

並列摘要


BACKGROUND: While listening experiments have proven the existence of Right-Ear Advantage (REA) for peripheral hearing function and speech discrimination ability in English speaking subjects, such pattern has yet to be confirmed in Mandarin speakers. The correlation of results between hearing thresholds and speech discrimination ability is also not well established. We hypothesized that REA exists for both peripheral hearing function and speech discrimination ability in Mandarin-speaking subjects. Speech discrimination scores were negatively correlated with hearing thresholds. And, interaural relative severity for peripheral hearing function and speech discrimination ability was also correlated. METHODS: A retrospectively assembled database of pure tone audiometry and speech discrimination score (SDS) of 215 Mandarin-speaking Taiwanese with normal or sensorineural hearing loss, who were collected from the out-patient department of Dalin Tzu Chi Hospital, were analyzed. RESULTS: RESULTS: The proportion of cases whose pure tone audiometry (PTA) of the right ear (RPTA) were better than PTA of the left ear (LPTA) was 39.5%, whose RPTA equaled to LPTA was 10.7%, and whose RPTA were worse than LPTA was 49.8%. The proportion of cases whose right speech discrimination score (RSDS) were higher than left speech discrimination score (LSDS) was 36.7%, whose RSDS equaled to LSDS was 31.7%, and whose RSDS were less than LSDS was 31.6%. PTA had significant negative association with SDS before and after adjusting other clinical variables only in the left ear of females. The proportion of inverse correlation between interaural difference of SDS of right ear versus left ear (RLSDS) and PTA of right ear versus left ear (RLPTA) was only 29.3%. CONCLUSIONS: There was no ear advantage for both peripheral hearing function and speech discrimination ability in these Mandarin speaking subjects. Peripheral hearing threshold could predict speech discrimination ability only in the left ears of females. Besides, the proportion of inverse correlation between interaural difference of SDS of right ear versus left ear (RLSDS) and PTA of right ear versus left (RLPTA) was low.

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