Cañete Oscar M, Purdy Suzanne C, Brown Colin R S, Neeff Michel, Thorne Peter R
Speech Science, School of Psychology, The University of Auckland, Auckland, New Zealand.
Eisdell Moore Centre for Research in Hearing and Balance, Auckland, New Zealand.
J Am Acad Audiol. 2019 Jul/Aug;30(7):564-578. doi: 10.3766/jaaa.17096. Epub 2018 Nov 14.
A unilateral hearing loss (UHL) can have a significant functional and social impact on children and adults, affecting their quality of life. In adults, UHL is typically associated with difficulties understanding speech in noise and sound localization, and UHL increases the self-perception of auditory disability for a range of listening situations. Furthermore, despite evidence for the negative effects of reduced unilateral auditory input on the neural encoding of binaural cues, the perceptual consequences of these changes are still not well understood.
Determine effects of UHL on auditory abilities and speech-evoked cortical auditory evoked potentials (CAEPs).
CAEPs, sound localization, speech perception in noise and self-perception of auditory abilities (speech, spatial, and qualities hearing scale) were assessed.
Thirteen adults with UHL with a range of etiologies, duration of hearing loss, and severity and a control group of eleven binaural listeners with normal hearing.
Participants with UHL varied greatly in their ability to localize sound and reported speech recognition and listening effort were the greatest problem. There was a greater effect of right ear than left ear hearing loss on N1 amplitude hemispheric asymmetry and N1 latencies evoked by speech syllables in noise. As duration of hearing loss increased, contralateral dominance (N1 amplitude asymmetry) decreased. N1 amplitudes correlated with speech scores, larger N1 amplitudes were associated with better speech recognition in noise scores. N1 latencies are delayed (in the better ear) and amplitude hemisphere asymmetry differed across UHL participants as function of side of deafness, mainly for right-sided deafness.
UHL affects a range of auditory abilities, including speech detection in noise, sound localization, and self-perceived hearing disability. CAEPs elicited by speech sounds are sensitive enough to evidence changes within the auditory cortex due to an UHL.
单侧听力损失（UHL）会对儿童和成人的功能及社交产生重大影响，进而影响他们的生活质量。在成人中，UHL通常与噪声环境下言语理解困难和声音定位困难相关，并且在一系列聆听情境中，UHL会增加听觉残疾的自我认知。此外，尽管有证据表明单侧听觉输入减少对双耳线索的神经编码有负面影响，但这些变化的感知后果仍未得到充分理解。
确定UHL对听觉能力和言语诱发的皮层听觉诱发电位（CAEPs）的影响。
评估了CAEPs、声音定位、噪声环境下的言语感知以及听觉能力的自我认知（言语、空间和听力质量量表）。
13名患有UHL的成人，病因、听力损失持续时间、严重程度各不相同，以及一个由11名听力正常的双耳聆听者组成的对照组。
患有UHL的参与者在声音定位能力上差异很大，他们报告说言语识别和聆听努力是最大的问题。右耳听力损失比左耳听力损失对噪声中言语音节诱发的N1波幅半球不对称性和N1潜伏期有更大影响。随着听力损失持续时间的增加，对侧优势（N1波幅不对称性）降低。N1波幅与言语得分相关，较大的N1波幅与噪声环境下更好的言语识别得分相关。N1潜伏期延迟（在较好的耳朵中），并且UHL参与者的波幅半球不对称性因耳聋侧别而异，主要是右侧耳聋。
UHL会影响一系列听觉能力，包括噪声环境下的言语检测、声音定位和自我感知的听力残疾。言语声音诱发的CAEPs足够敏感，能够证明由于UHL导致的听觉皮层内的变化。
