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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。

By late autumn in 1944, the Do 335A-l full production model appeared at Oberpfaffenhofen, this introducing the definitive 1,800 hp (1342 kW) 12-cylinder DB 603E-1 engine and two underwing hardpoints capable of carrying fuel or 550 lbs (250 kg) bombs.

到1944年秋以前，全装备的Do 335A-1已经出现在了奥伯法芬霍芬，它最终采用了 DB 603E-1型发动机，并且在机翼下加装了两个硬挂点，可挂载油箱或者250千克（500磅）的炸弹。

METHODS: The BALB/c mice were exposed to infrasound (8 Hz/130 dB) for 1, 7 and 14 d, respectively, 2 h daily, and the control groups were unexposed.

采用8 Hz， 130 dB的次声分别作用于1， 7和14 d组3个实验组，各雄性Balb/c小鼠20只，每日次声暴露2 h。

Methods A DB-WAX capillary column was used with FID as detector and acetoacetate as the solvent.

采用 DB-WAX 毛细管柱， FID 检测器，乙酸乙酯为溶剂。

Results It was found that the content of high-mannose type/hybrid type N-glycans and tri-/tetra- antennary complex type N-glycans were decreased, while biantennary complex type N-glycan was increased on SMMC 7721 cell surface by ATRA or db-cAMP treatment.

结果 ATRA和db-cAMP均使SMMC 7721细胞表面高甘露糖型/杂合型和三/四天线复杂型N-糖链减少而二天线复杂型N-糖链增多。

Audiometric ealuation in two subjects showed 80- to 100-dB HL by the age of 10 years.

两名受试者在10岁前的听力检测评价显示听力丧失80到100-dB。

To ensure an adequate offset, the countervibration of the actuator in the overall operating range (20 – 800 Hz) has to be generated with an accuracy of ± 5 degrees in the phase and ± 0.5 dB in the amplitude.

为了保证充分消声，传动装置所有操作范围（20 – 800 Hz）中产生的抗振相位精确度必须达到± 5度，振幅精确度必须达到± 0.5 dB。

The content of naphthalin in circulating wash oil was determined by capillary column gas chromatography with DB-1 capillary column and FID detector.

采用DB-1毛细管柱和FID检测器，以毛细管柱气相色谱法测定循环洗油中的萘含量。

In this paper, the multilayer system of Ni-Cr-Al-Y-Si overlayer with a DB and a bond coat was deposited on the DSM11 substrate by one-step AIP.

由恒温氧化、循环氧化和粘胶拉伸实验考察了涂层的抗氧化性、 DB阻挡元素扩散能力和体系的界面结合强度。

As a example, four kinds of switch structures are discussed, numerical results show that the off/on extinction ratio can be less than -90 dB and the dynamic switching range can be less than 0.03 Pc/100, and as an optical stabilizator, the fluctuation of the limiting power level can be less than 10-7Pc.

数值分析表明，级联耦合器作为全光开关，消光比可小于-90 dB，动态开关区可小于3×10-4 Pc；作为光功率稳定器和光学限幅器，其输出光功率起伏可小于10-7 Pc。标签非线性耦合光开关光限幅器 nonlinear coupling optical switch optical limiter

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。