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- discrete frequency audiometer 分(单)频式听力计, 分频测听计, 分频听力计
- Applying Volterra functional series and discrete Fourior tansform (DFT) to the system, we can obtain the model of the system in discrete frequency domain. 应用Volterra泛函级数和离散傅里叶变换理论于非线性系统,本文给出非线性系统在离散频率域的模型。
- In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance. 发现对于给定的喷嘴和冲击距离,存在一个压比临界点,当压比高于此临界点值时,流场振荡和离散频率噪声被显著抑制乃至消失。
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent ultraviolet, visible, or infrared radiation. 激光器使偶然的混杂频率的电磁辐射,变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种
- Only certain discrete frequencies are left without benefit of external stabilization due to the feed system. 只有某些个别的频率没有利用供应系统的外部稳定作用。
- continuous sweep frequency audiometer 连续扫频式听力计, 连(续扫)频听力计
- Synthesize of time domain wave form by summation of harmonics or sinusoidal wave form of discrete frequencies. 以离散频率之弦波合成时域脉波之波形。
- discrete frequency soft-starting 分级变频软启动
- Methods 50 patients received standard pure-tone and extended high frequency audiometry for hearing measurement. 方法对50例压力性鼓膜穿孔患者的常频和扩展高频测听的听阈结果进行分析。
- Objective To investigate the application of extended high frequency audiometry in early diagnosis of hearing loss of noises and tinnitus. 目的探讨扩展高频测听对耳鸣及噪音性聋患者早期听力损害的诊断意义。
- Objective To assess the meaning of extended high frequency audiometry in early diagnosis of presbycusis and the relation of it to the age. 摘要目的探讨扩展高频测听与年龄的关系及其对老年性听力损失早期诊断的意义。
- Conclusion Extended high frequency audiometry have meaning in early diagnosis of presbycusis, and the age of patients shoud be considered. 结论扩展高频测听可以作为对老年性听力损失进行早期诊断的依据。在对病人进行高频测听分析时应考虑年龄因素。
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent ultraviolet,visible,or infrared radiation. 激光器使偶然的混杂频率的电磁辐射,变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种。
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherentultraviolet, visible, or infrared radiation. 激光器使偶然的混杂频率的电磁辐射,变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种。
- Both of them were tested by the high frequency audiometry(HFA), and the results were analysed. Results: The average threshold of HFA in study group(27.97dBSPL) was higher than that of control group(19.17dBSPL). 结果 :实验组延伸高频听阈平均值为 2 7.;97dBSPL;对照组为 19
- Methods The group with noise exposure history and tinnitus which were normal examined by pure-tone audiometry and control group were examined by extended high frequency audiometry. 方法应用扩展高频测听对常规纯音测听测试正常的耳鸣及噪音暴露者和正常对照组进行检测。
- Methods:DPOAE,conventional pure tone audiometry and expanded high frequency audiometry were examined in 24 gynecologic cancer patients before and after the first time of cisplatin administration. 常频纯音测听及扩展高频测听检查,比较DPOAE和常频纯音测听、扩展高频测听的结果。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位,等于每秒一周
- They give off discrete amounts of radiant energy. 它们放出不连续的辐射能量。