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Threshold

A threshold, by definition, is the lowest quantity that elicits a certain response. In audiology, threshold is commonly used to assess hearing in diagnostic test procedures. The threshold of audibility is the minimum effective sound pressure level of a signal that is capable of evoking an auditory sensation. Threshold assessment is used in both clinical and research protocols, and threshold itself has historically been considered a somewhat complex concept. Research over the years has shown that true threshold sensitivity can vary from moment to moment based on both intrinsic factors, such as breathing or heartbeat, and extrinsic factors, such as room temperature and ambient noise. In a clinical test situation, extrinsic factors can be largely controlled by using test environments that meet ambient noise standards ...

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