8/6/2023 0 Comments Hearing processing![]() ![]() The brief tone frequency test is a valuable test that was introduced a number of years ago, but unfortunately is not widely used by audiologists. One of the interesting tests that we'll discuss in this presentation is the brief tone frequency test (my term). The trade off between intensity and time (and threshold) is related to temporal integration (how sound energy is intergrated into the auditory system over time). Hence, as one shortens the duration of a tone or noise burst until it is a very brief stimulus, it raises your threshold. The duration of a stimulus influences threshold (or your detection). Temporal integration is quite simple - as one decreases the duration of the stimulus, it becomes more difficult to detect, especially below durations of 200 milliseconds. I like to categorize four kinds of temporal processing: integration, sequencing, resolution, and masking. While there are certain labs that can and do test discrimination, tests are not available for routine clinical use this kind of test is sorely needed. Although discrimination is an important area, there are essentially no tests that are commonly used in measuring either frequency discrimination, intensity discrimination, or duration discrimination. The last category of central auditory tests are discrimination tasks. The newer procedures afford some facility and are better designed, but the underlying concept remains the same. These include filtered speech tests, compressed speech tests, and speech-in-noise tests that are becoming routinely used. ![]() In some cases electrophysiologic measures are critical, but the development in this area hasn't been quite as fast as we had predicted it would be. The Monaural Low Redundancy speech tests are possibly the oldest and the most ubiquitous tests. Electrophysiologic procedures can be of value, although they are not in routine use at this stage of auditory processing evaluations. Then we have the procedures in the second column of Figure 1. These are the tests we'll discuss today.ĭichotic listening tests are also valuable, as are Binaural Interaction tasks, such as masking level differences, various kinds of localization tasks, spatial tasks and others. Most people would agree that temporal processing procedures are important in evaluating the auditory system. I believe conducting tests of temporal processing is one of the most important procedures we should do. Temporal processing tests are listed in the blue circle in the upper left. The ones on the left side are the procedures that I think give you the most information from a practical standpoint and also from a research standpoint. It is also the latter that will be focused on today.įigure 1 shows the categories in which we'll find most of the central auditory tests that are available today.įigure 1. There is both a peripheral and a central influence to temporal processing, more the latter as tasks get more complex. Temporal processing plays an even bigger role in more sophisticated listening tasks. Temporal processing is important to everything we do as audiologists in terms of measuring hearing and responses to various kinds of acoustic stimuli. Most sounds, of course, are acoustic events. Temporal processing refers to the perception of time alteration or influence on an audible acoustic event(s).
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