Hawkins D B
J Speech Hear Disord. 1980 Feb;45(1):3-15. doi: 10.1044/jshd.4501.03.
Before any amplification system is evaluated, prescribed, or recommended, the audiologist must determine that the limits of its output across frequency are not greater than the levels at which clients experience discomfort, that is, their Loudness Discomfort Levels (LDL). After reviewing terminology, reasons for obtaining LDLs, and several sources of variability in LDL measurements, a new clinical LDL measurement procedure for hearing aid evaluations is suggested. The main aspects of this procedure are the instructions (from Morgan, Wilson and Dirks, 1974), the stimuli (sweep-frequency pulsed pure tones), the psychophysical method (tracking procedure), the calibration of the stimuli (by a hearing aid receiver attached to a 2 cm3 coupler), and the presentation of the stimuli (through the hearing aid receiver coupled to the client's earmold). This technique is suggested as clinically feasible and as a defensible procedure for obtaining LDLs for the purpose of more closely specifying an appropriate SSPL90 curve.
在对任何放大系统进行评估、开处方或推荐之前，听力学家必须确定其在整个频率范围内的输出限度不超过客户感到不适的水平，即他们的响度不适阈（LDL）。在回顾了相关术语、获取LDL的原因以及LDL测量中的几个变异性来源后，提出了一种用于助听器评估的新的临床LDL测量程序。该程序的主要方面包括说明（来自摩根、威尔逊和德克斯，1974年）、刺激（扫频脉冲纯音）、心理物理学方法（跟踪程序）、刺激校准（通过连接到2 cm³耦合器的助听器接收器）以及刺激呈现（通过连接到客户耳模的助听器接收器）。建议该技术在临床上可行，并且作为一种合理的程序，用于获取LDL，以便更精确地确定合适的SSPL90曲线。
