Using probe-microphone measurements to improve the match to target gain and frequency response slope, as a function of earmould style, frequency, and input level
Using probe-microphone measurements to improve the match to target gain and frequency response slope, as a function of earmould style, frequency, and input level
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DOI：
10.3109/14992027.2015.1104736
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发表时间：
2016-04-02
影响因子：
2.7
通讯作者：
Smith, Mark
中科院分区：
文献类型：
--
作者：
Munro, Kevin J.;Puri, Reema;Smith, Mark
目的：匹配60 - 65 dB SPL的处方增益目标并不能确保较低输入电平的可听度，也不意味着拟合的频率响应斜率有助于获得良好的音质。本研究的目的是评估使用探头麦克风测量匹配目标的增益和斜率，作为一个功能的耳模的风格，频率和输入电平。设计图：对于制造商的"初始配合"（IF）设置，以及分别在49和51个开放细管和定制耳模配件中调整到目标后，计算了50、65和80 dB SPL输入的真耳插入增益。研究样本：100名成人，中位年龄74岁（范围32 - 93岁）。结果：约18%-67%的IF设置在目标增益的10 dB范围内，但调整后这一比例增加至> 85%。大约47%-71%的中频设置在目标斜率的10 dB范围内，但除了2 - 4 kHz之外，调整后这一比例增加到> 88%。结论：结果表明，IF设置是不够的，至少在本研究中使用的助听器的模型，然而，显着的差异仍然存在，即使在调整。
Objective: Matching a prescription gain target at 60-65 dB SPL does not ensure audibility of lower input levels, nor does it mean the fitted frequency response slope is conducive to good sound quality. The aim of the present study was to evaluate the use of probe-microphone measurements to match target gain and slope, as a function of earmould style, frequency, and input level. Design: The real-ear insertion gain was calculated for an input of 50, 65, and 80 dB SPL for the manufacturer's 'initial fit' (IF) settings and after adjustment to target in 49 and 51 open slim-tube and custom earmould fittings, respectively. Study sample: One hundred adults with median age 74 years (range 32-93). Results: Some 18%-67% of the IF settings were within 10 dB of the target gain but this increased to >85% after adjustment. Some 47%-71% of the IF settings were within 10 dB of the target slope but, with the exception of 2-4 kHz, this increased to >88% after adjustment. Conclusions: The results indicate that IF settings are inadequate, at least for the model of hearing aid used in the present study; however, significant discrepancies remained, even after adjustment.