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1 对象和方法1.1 研究对象和分组1.1.1 初次接噪观察 从武警礼炮部队中选取15名首次参加礼炮鸣放的男性战士,年龄19～2 2a ,以排除噪声积累因素。对该15名战士分别于鸣放前、鸣放后3h和7d进行血压、心率及心电图检查,以明确初次接噪前后心血管系统的变化情况。1.1.2 噪声
1 Subjects and Methods 1.1 Subjects and Subgroups 1.1.1 Observation of Initial Pickups 15 male soldiers who participated for the first time in Salute of Salute from Armed Police Squadron, aged 19-2 2a, were selected to exclude noise accumulation factors. Blood pressure, heart rate and electrocardiogram were examined before and after the release of the 15 soldiers at 3h and 7d respectively to clarify the changes of the cardiovascular system before and after the initial exposure to noise. 1.1.2 Noise