Lewis D E, Feigin J A, Karasek A E, Stelmachowicz P G
Boys Town National Institute, Omaha, Nebraska.
Ear Hear. 1991 Aug;12(4):268-80. doi: 10.1097/00003446-199108000-00006.
In the past, frequency modulated (FM) systems were recommended for use only in educational settings for children with severe or profound hearing losses. Recent studies, however, have suggested that FM systems may be appropriate in nonacademic settings and also may benefit children with minimal hearing loss. In addition to the more widespread application of FM use, advances in amplification technology have provided audiologists with a variety of devices and coupling options, resulting in more variables to evaluate in the fitting process. There are three commonly used methods of evaluating FM systems: functional gain measures, probe tube microphone measures, and coupler measures. This paper is intended to provide the audiologist working with FM systems with an overview of the complexities involved in selecting and setting FM systems and the benefits and limitations of each evaluation method. Each evaluation method is examined in view of how well it answers three basic questions related to frequency response, maximum output, and distortion in FM systems. Finally, other issues which may impact on the selection of an FM system for a given individual are discussed.
过去，调频（FM）系统仅被推荐用于重度或极重度听力损失儿童的教育环境中。然而，最近的研究表明，调频系统在非学术环境中可能也是合适的，并且对轻度听力损失儿童也可能有益。除了调频系统应用更为广泛之外，放大技术的进步为听力学家提供了多种设备和耦合选项，这使得在验配过程中有更多变量需要评估。评估调频系统通常有三种方法：功能增益测量、探管麦克风测量和耦合器测量。本文旨在为使用调频系统的听力学家提供一个概述，介绍选择和设置调频系统所涉及的复杂性以及每种评估方法的优缺点。从每种评估方法对与调频系统频率响应、最大输出和失真相关的三个基本问题的回答程度来审视每种评估方法。最后，讨论了可能影响为特定个体选择调频系统的其他问题。
