查询词典 on the threshold

Low frequency sound waves (around 19 Hertz), which are below the threshold of hearing, have also been shown to precipitate a feeling of presence and the perception of shadowy images in the periphery of vision.

低频声波（约19赫兹）人耳听不到，但是也被证实可以让人产生一种有东西存在的感觉，并且在视力边缘感觉到有阴影。

ResultsThe threshold value of hearing for pure sound and air conduction at the frequency of 8KHz was significantly different(P﹤0.05 or P﹤0.01)from the re...

结果接触组中工龄≥2a或尿中TCA浓度≥50mg/L的调查对象，在8KHz频段纯音气传导听阈值与对照组的差异有统计学意义(P﹤0.05或P﹤0.01)；在接触组内，工龄≥2a的调查对象在4、6和8KHz高频段听阈值均明显高于工龄﹤2a者(P﹤0.05或P﹤0.01)。

The 46 ears classify into three groups on the basis of hearing threshold level,and classified into four groups on the basis of different disorders.Results The amplitude and reproducilbiity decreased as the hearing loss increased.

选择经耳镜检查、纯音听阈及声导抗测试确诊为中耳病变，纯音气导听阈不超过30 dB HL的46只病变耳及对照组正常28耳进行TEOAE测试，病变46耳分别按不同听阈水平及不同病变分组，并对其结果进行分析比较。

The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

结果当大气压低于正常值2kPa时，受试者言语频率的纯音听阈显著提高（均P〈0.01），鼓室压力值发生显著改变（P〈0.05）；当大气压低于正常值4kPa时，受试者500、2000Hz的纯音听阈显著提高（P〈0.01和P〈0.05），鼓室压力值发生显著改变（P〈0.01）。

Results The average value of the hearing threshold was 70.67±20.43 dB HL in group A and 67.58±36.18 dB HL in group B(P＞0.05)before treatment.The average value of the hearing threahold reduced to 30.09±20.43 dB HL in group A and 18.42±18.05 dB HL in group B(P＜0.05) after treatment.

结果 治疗前A组和B组的平均听阈分别为70.67±20.43 dB HL和67.58±36.18 dB HL(P＞0.05)，治疗后两组听力平均提高分别为30.09±20.43 dB和18.42±18.05 dB(P＜0.05)。

MethodsTwenty volunteers with normal hearing level and tympanic pressure were enrolled and kept at airtight container. The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

方法选取听力和鼓室压力正常的受试者20例，即单耳40耳，评估其于50s改变密闭模拟电梯容器压力低于正常大气压2kPa、50s改变密闭容器压力低于正常大气压4kPa、以及压力恢复至正常水平时，言语频率500、1000、2000Hz的纯音听阈，鼓室压值和声阻抗曲线图形形态，以及鼓膜形态。

The study also evaluates the effects of FbAANC headset on speech intelligibility on a disyllabic Mandarin word discrimination test platform. We expect someone under the noisy environment in SNR equal 0,–5,–10,-15,-20 and –25 dB, the noise cancellation technique could either improve the speech discrimination effectively. Finally, the SNR below -10dB, the mean WDT score with FbAANC headset was superior to without FbAANC headset 13 to 32% through 30 subjects of normal hearing threshold for evaluation. These results suggest that the FbAANC headset would be useful for hearing protection in workplaces with high levels industrial noise.

同时，本论文亦透过华语双字词语音辨识力测验，以评估此噪音消除技术对於语音理解力的影响，期望在SNR为0，-5，-10，-15，-20和-25dB的环境下，暸解噪音消除技术能否有效提升语音辨识力；经过30位正常听力的受测者之评估，我们可以得到当讯噪比在-10 dB以下时，经过噪音消除后的语音辨识力成绩可明显地提升13 to 32%，因此，本噪音消除耳机确实可以作为耳机防护以提供给工人对抗高分贝的工厂噪音。

Results Hearing threshold of both groups become worse with aging, and the treatment group showed the better auditory sensitivities, the less concentrations of MDA and the less frequency of mtDNA^4834bp deletion compare with the placebo group.

结果 （1）大鼠11月龄时，对照组与实验组的ABR反应阈为（49.3 3.9 ）dBSPL与（49.7 4.4） dBSPL（P＞0.05），耳蜗中丙二醛含量为（10.8 1.7）与（11.6 2.1） pmol/g，P＜0.05；耳蜗内mtDNA4834bp缺失的发生率比较，差异无统计学意义（P＞0.05）；（2）大鼠24月龄时，对照组与实验组的ABR反应阈、耳蜗中丙二醛含量及耳蜗内mtDNA4834bp缺失的发生率比较，差异有统计学意义（P＜0.01、P＜0.01和P＜0.05）。

The average of hearing threshold shifts at high frequencies(4k, 6k, 8kHz) is considerably larger than that at low frequencies(0.5k, 1k, 2k Hz). The moderate to severe degree of hearing loss of the paper mill workplace of subjects showed maximum notches at the frequency of 4 kHz. The noise-exposure group grades of DNA damage were significantly higher then the controls.

经扣除年龄老化因素所得到的听力损失修正值，结果显示在谈话性低频率0.5KHz、1 KHz中，女性比男性听力损失严重，并以女性、≧50岁、右耳、1 KHz 之平均值39.0±17.2dB为最高值，而於高频率2KHz至8 KHz中，不同年龄层之比较，以男性、≧50岁、右耳、8KHz之平均值49.0±27.1dB为中度至重度听力损失情形。

But statical compliance showed no change.（3）There were significant differences between the chronic sinusitis and the controls, and among stages in air hearing threshold of each frequency of chronic sinusitis. Conclusions As the stage of chronic s

随慢性鼻窦炎分型分期加重，异常导抗图、镫骨肌反射消失增多，峰压值偏向负压，坡度值增加；静态声顺值无或少变化；同时听力损伤加重。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。