Stellmack M A
Parmly Hearing Institute, Loyola University of Chicago, Illinois 60626.
J Acoust Soc Am. 1994 Sep;96(3):1465-70. doi: 10.1121/1.411443.
Threshold interaural delays were measured for a single interaurally delayed 753-Hz target component presented against a background of six diotic distractor components (453, 553, 653, 853, 953, and 1053 Hz). In one set of conditions, all components were gated on simultaneously, but 200-ms after their onset the distractors were turned off for 10, 25, 50, 100, or 200 ms, then turned on again for the remainder of the 500-ms listening interval. In a second set of conditions, the target component was present only during the temporal notch in the distractors for notch durations of 50, 100, and 200 ms. Threshold interaural delays were also measured for the target component in isolation at durations of 50, 100, 200, and 500 ms. In both sets of conditions in which the distractors were present, it was observed that a brief isolated presentation of the target reduced threshold interaural differences of time to nearly the level of thresholds for the target presented in total isolation, while thresholds were many times higher when the distractors had no temporal notch. Possible sources of binaural interference are discussed and the evidence supporting each is evaluated.
针对在六个双耳呈现的干扰成分（453、553、653、853、953和1053赫兹）背景下呈现的单个双耳延迟的753赫兹目标成分，测量了阈限双耳延迟。在一组条件下，所有成分同时开启，但在其起始后200毫秒，干扰成分关闭10、25、50、100或200毫秒，然后在500毫秒的聆听间隔的剩余时间再次开启。在第二组条件下，目标成分仅在干扰成分的时间缺口期间出现，缺口持续时间为50、100和200毫秒。还测量了目标成分在50、100、200和500毫秒时长单独呈现时的阈限双耳延迟。在干扰成分存在的两组条件中，均观察到目标成分的短暂单独呈现将阈限双耳时间差异降低到几乎与完全单独呈现目标时的阈限水平，而当干扰成分没有时间缺口时，阈限要高很多倍。讨论了双耳干扰的可能来源，并对支持每种来源的证据进行了评估。
