Swan I R, Browning G G, Gatehouse S
Br J Audiol. 1987 Feb;21(1):59-65. doi: 10.3109/03005368709077775.
The criteria generally used to decide in which ear to fit a monaural hearing aid are based on theory or anecdote and have not been verified by experimental observation. In this study to determine optimum side of fitting, 58 new hearing aid users were fitted with a hearing aid in one ear for 10 weeks, and then fitted in the other ear for a further 10 weeks. Subsequently, the subjects were asked their preference for side of hearing aid use and their reasons for this preference. 30 (52%) subjects reported better hearing with their aid in one ear than in the other; 24 (80%) of these preferred the ear with the poorer half-peak level elevation on a speech audiogram. The remaining 28 (48%) reported no difference in their aided hearing ability between ears, though 20 preferred one ear for practical reasons, unrelated to audiometric parameters. A patient's preference for side of fitting can be predicted from audiometric data but with only modest reliability. It is, therefore, recommended that bilateral ear moulds should be routinely provided for bilateral mild to moderate hearing impairment (speech frequency average less than 75 dB HL). If it is decided that only one ear mould should be provided, this should be made for the poorer hearing ear. The poorer hearing ear is best identified from the half-peak level elevation on a speech audiogram.
通常用于决定单耳助听器佩戴在哪一侧耳朵的标准是基于理论或轶事，尚未得到实验观察的验证。在这项确定最佳佩戴侧的研究中，58名新的助听器使用者在一只耳朵佩戴助听器10周，然后在另一只耳朵再佩戴10周。随后，询问受试者对助听器佩戴侧的偏好以及他们产生这种偏好的原因。30名（52%）受试者报告称一只耳朵佩戴助听器时听力比另一只耳朵更好；其中24名（80%）在言语听力图上半峰水平提升较差的那只耳朵佩戴助听器时听力更佳。其余28名（48%）受试者报告称双耳佩戴助听器后的听力能力没有差异，不过其中20名出于与听力测定参数无关的实际原因更喜欢一只耳朵。可以根据听力测定数据预测患者对佩戴侧的偏好，但可靠性仅为一般。因此，建议对于双侧轻至中度听力损失（言语频率平均小于75 dB HL）的患者常规提供双耳耳模。如果决定只提供一个耳模，应该为听力较差的耳朵制作。听力较差的耳朵最好根据言语听力图上的半峰水平提升来确定。
