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The natural frequency of a successful dental implant is 7.0 kHz ~ 9.0 kHz.

成功骨整合的人工牙根其自然频率数值为7.0 kHz ~9.0 kHz之间。

Aql X-1 is one of the Atoll sources with kHz QPO. We have studied the correlations between the frequency of kHz QPO and the shape of X-ray spectrum. Implications of our results for the accretion and quasi periodic oscillation production process are discussed.

Aquila X-1是一个具有kHz QPO的Atoll源，我们研究了其kHz QPO频率和能谱之间的相关性质，并讨论了结果对了解吸积及准周期振荡产生过程的意义。

In noise-exposed ears, the occurrence of threshold changes in the high frequency range (10 to 20 kHz) is earlier than that in the low frequency range (0.5 to 6 kHz).

接触噪声的各年龄组10～18 kHz阈值随年龄的增长而升高；不同工龄组比较，6～10年工龄组的10～18 kHz阈值明显升高；不同噪声强度组的10～20 kHz阈值比较差异无显著性（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。

THD+N: 20-Hz HPF, 20-kHz AES17 LPF Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Channel separation: 20-Hz HPF, 20-kHz AES17 LPF Analog performance specifications are measured using the System Twot Cascade audio measurement system by Audio Precision in the averaging mode.

的THD + N：20 Hz的高通滤波器，20千赫AES17 LPF的动态范围：20 Hz的高通滤波器，20千赫AES17低通滤波器，A加权信号噪音比：20 Hz的高通滤波器，20 kHz的AES17，A加权频道分离低通滤波器：20 Hz的高通滤波器，20千赫AES17 LPF的模拟性能指标均采用了精密音频系统Twot梯级音频测量系统中的平均模式。

With ILO-92 Otodynamics Analyzer,distortion product otoacoustic emissionsat the 2 f1-f2 frequency were recorded from 86 normally hearing ears in response to four groups of different primary levels (L1=L2=75 dB SPL ; L1=L2=65 dB SPL ; L1=L2=60 dB SPL ; L1=65 dB SPL , L2=50 dB SPL).The average DPOAEs-gram demonstrated a bilobed contour with two peaks at approximately 1.5 kHz and 5 kHz and a "notch" between 2.5 kHz and 3 kHz.Moreover,the contour of DPOAEs-gram had no obvious changes with sex,ear or primary stimulus levels differences.

利用耳动态分析仪ILO-92，对48例听力正常人(86耳)在4组不同原始刺激强度下(L1=L2=75 dB SPL；L1=L2=65 dB SPL；L1=L2=60 dB SPL；L1=65 dB SPL，L2=50 dB SPL)进行畸变产物耳声发射检查，结果发现平均DPOAEs图呈双叶型轮廓：在1.5 kHz和5 kHz附近，2 f1-f2 DPOAEs存在两个高峰，在2.5～3 kHz附近存在一个低谷，此图型结构无性别、耳别差异。

Results show that for KEMAR mannequin,pinnae destroy the front-back symmetry of HRTF above 5～6 kHz,while for human subjects it reduces to 2.5 kHz because of the locations of ears.

结果表明，在5 kHz至6 kHz以上的频率，耳廓破坏了头相关传输函数的前后对称性；而受耳道入口位置的影响，真人受试者的头相关传输函数在2.5 kHz以上的频率就开始出现前后不对称。

Analyses reveal that shoulder reflection is irrelevant to clothing below 3.0 kHz, while without pinnae clothing has some influence on should reflection and HRTF above 5.0 kHz.

实验结果表明，在3.0 kHz以下肩部反射声几乎与衣服无关；而无耳廓时，不同的衣服对5.0 kHz以上的肩部反射声以及头相关传输函数有一定的影响，但耳廓的存在会掩盖肩部反射的高频部分。

Although impedances of both fresh and frozen-thawed bluntsnout bream decreased as frequencies increasing from 1 kHz to 20 kHz, change ratio of impedance of fresh samples was evidently higher than that of frozen-thawed ones.

结果表明：从1 kHz增大到20 kHz，冰鲜和解冻团头鲂的阻抗均随着频率的增大而减小，冰鲜团头鲂的阻抗相对变化Q值明显大于解冻团头鲂。

The results showed that the echolocation calls of the leaf-nosed bats were constant frequency-frequency modulation signals with 2-3 harmonics and the second one among these three harmonics was its dominant frequency. The constant frequency components of three harmonics (Mean±SD, n=18 ) were 33.3±0.2 kHz, 66.5±0.3 kHz, and 99.4±0.5 kHz, respectively. In examined FTCs of 72 IC neurons, their Q 10 -dB values ranged from 0.5 to 95.4 (9.2±14.6) and the neurons whose best frequency around the dominant frequency had sharp frequency tuning.

结果发现，大蹄蝠回声定位叫声为恒频-调频(constant frequency-frequency modulated，CF-FM)信号，一般含有2~3个谐波，第二谐波为其主频，CF成分频率(Mean±SD，n=18)依次为：(33.3±0.2)、(66.5±0.3)、(99.4±0.5)kHz；电生理实验共获得72个神经元的频率调谐曲线，Q10-dB值的范围是0.5~95.4(9.2±14.6， n=72)，最佳频率(best frequency，BF)在回声定位主频附近的神经元具有尖锐的频率调谐特性。

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。