该作者选择18～25岁除吸烟外无慢性或反复发作听力障碍、也无近期用药史的123名健康男性(55名吸烟、68名不吸烟)作为受试者,进行四个实验,吸烟者每天吸20支以上,不吸烟者也不曾服用其它尼古丁类食品。每位受试者用220Hz探测音行鼓室测压表明正常(0±0.25kPa),听阈检测于0.25、0.5、1、2、3、4、6和8kHz等8个频率均低于20dBHL。每次试验至少重复2次,所有试验均在隔音室进行。实验1(E_1):35位吸烟和38位不吸烟受试者,实验前戒烟6小时,在同一条件下给予噪声刺激,于噪声刺激前后检查听阈变化;实验2(E_2):10名吸烟受试者实验前戒 The authors selected 123 healthy men (55 smokers and 68 non-smokers) aged 18 to 25 years who had no chronic or recurrent hearing impairment other than smoking and no recent history of drug use. Four smokers More than 20 cigarettes a day, non-smokers have never taken other nicotine foods. Each subject showed a normal (0 ± 0.25 kPa) tympanometry with a 220 Hz sounding tachycardia, with hearing thresholds below 8 dBH at 0.25, 0.5, 1, 2, 3, 4, 6, and 8 kHz. Each test is repeated at least 2 times and all tests are conducted in soundproof rooms. Experiment 1 (E_1): 35 smokers and 38 non-smokers, smoking for 6 hours before the experiment, noise stimulation under the same conditions, before and after noise stimulation to check the threshold changes; Experiment 2 (E_2): 10 smokers Pre-test precepts