Among other dangers, soldiers in combat often risk hearing damage. A new source of damage is an increase in crew compartment noise resulting from the addition of armored protection to Highly Mobile Multi-Wheeled Vehicles (HMMWVs, commonly known as "Humvee"). To protect soldiers, the US Army may replace the current Interim Headset (IH) with an Improved Tactical Headset (ITH), which uses noise cancellation technology. However, decision makers are concerned that the ITH may affect perception. In the current study, twenty-one soldiers were tested for accuracy of sound localization in an 8 x 2 mixed experimental design (Speaker Location x Headset Type). Results indicate soldiers wearing either headset experienced the front/back confusion typically found in the literature; but soldiers wearing the ITH localized sound more accurately when the sounds originated from their rear and right rear. These findings may support the ITH as the preferred intervention.
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机译：除其他危险外，战斗中的士兵经常有听力受损的风险。一种新的损害来源是由于高度机动多轮车辆（HMMWV，通常称为“悍马”）增加了装甲防护，导致机舱噪声增大。为了保护士兵，美国陆军可能会使用改进的战术耳机（ITH）来代替当前的临时耳机（IH），后者使用了噪音消除技术。但是，决策者担心ITH可能会影响感知。在当前的研究中，以8 x 2混合实验设计（扬声器位置x耳机类型）测试了21名士兵的声音定位准确性。结果表明，戴着这两个头戴式耳机的士兵经历了文献中常见的前/后混淆。但是当声音来自后方和右后方时，佩戴ITH本地化声音的士兵会更准确。这些发现可能支持ITH作为首选干预措施。
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