Department of ENT/Audiology and EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands.
Int J Audiol. 2013 Mar;52(3):189-93. doi: 10.3109/14992027.2012.736031. Epub 2012 Nov 15.
A common method to assess the functional benefit of hearing aids is by measuring the performance-intensity curve of single words in quiet with and without hearing aids. Currently, virtually all hearing aids use signal processing, which may have a marked effect on gain as a function of time. Thus, hearing-aid behavior may be different for a word presented in isolation compared to the same word preceded by a carrier phrase, which is a closer replication of natural conversation. The present research was conducted to assess this difference.
In a hearing-aid test box, speech materials were routed through hearing aids and the output was recorded with a 2cc coupler.
Seven different hearing aids were programmed according to the manufacturer's fitting rules, using a given hearing loss.
Depending on the hearing aid, and the hearing-aid setting, differences in the overall level of the hearing-aid processed words ranged from 1.5 to 3.5 dB. Differences were due to slow attack times in amplitude compression.
Although differences were small for most hearing aids, the use of a carrier phrase should be considered in speech intelligibility tests to ensure that hearing-aid performance closer reflects that in real life.
评估助听器功能益处的常用方法是测量在安静环境中使用和不使用助听器时单字的性能-强度曲线。目前，几乎所有助听器都使用信号处理，这可能会对增益随时间的变化产生显著影响。因此，与单独呈现的单词相比，助听器在处理紧随在起始词之后的短语时的行为可能有所不同，因为短语更接近自然对话。本研究旨在评估这种差异。
在助听器测试盒中，语音材料通过助听器传输，输出通过 2cc 耦合器记录。
根据制造商的适配规则，使用给定的听力损失，对七种不同的助听器进行编程。
根据助听器和助听器设置的不同，助听器处理后的单词整体水平差异在 1.5 到 3.5dB 之间。差异是由于幅度压缩的缓慢攻击时间引起的。
尽管大多数助听器的差异较小，但在言语可懂度测试中应考虑使用起始词，以确保助听器的性能更接近实际生活中的表现。
