共振峰

Methods The GSI-16 clinical two channel audiometer with built in sound field system was used to observe 143 cases(168 ears)with various hearing aids.

应用GSI-16纯音听力计附声场测听系统，观察168耳不同类型助听器使用者助听前的听力损失和助听后的听力补偿；测试裸耳及佩戴不同类型耳内式助听器后外耳道共振峰幅值；测试22耳耳内式助听器使用者的言语分辨率。

The curve of third harmonic sound pressure level(SPL3)is alsoa "periodic function".The period length is about"first resonancefrequency" of the tube Δf=f0=c0/(2L).The magnitude of SPL3 canbe predicted by Coppens theory(with one of the parameters modified).

三次谐波声压级变化曲线为一"准周期"函数，周期长度为驻波管的第一共振频率值Δf＝f0＝C0/2L，用Coppens所推导的"共振"时公式，计算三次谐波共振峰的量值，表明仍存在差异，只有经过参数修正才能所得结果。

Assignments have been made on the spectra for all peaks of the Aliphatic and olefinic carbons using chemical shift corrective terms together with furukawa parameters.

本工作用~(13)C-NMR进行了研究，得到的聚合物的~(13)C-NMR图谱表明，聚合物的脂碳部分共有十一个共振峰，烯碳部分有九个峰。

By locking laser frequency to atomic absorption spectrum through current negative feedback and locking microwave frequency to electromagnetic induced transparency resonance peak through voltage negative feedback, it is realized to lock the clock frequency of this laboratorial desktop experimental CPT frequency standard.

通过采用电流负反馈将激光频率锁定在原子对激光的吸收峰上，电压负反馈将微波频率锁定在电磁感应透明共振峰上，用该物理系统实现了闭环锁定的实验室桌面CPT频标实验系统。

By locking laser frequency to atomic absorption spectrum through current negative feedback and locking microwave frequency to electromagnetic induced transparency resonance peak through voltage negative feedback respectively, the locking of the clock frequency of this laboratorial desktop experimental CPT frequency standard is realized.

介绍了相干布居囚禁原子频标的小型、低功耗物理系统，并应用它开展实现了CPT原子频标的激光锁定、微波锁定方案的实验室研究。通过采用电流负反馈将激光频率锁定在原子对激光的吸收峰上，电压负反馈将微波频率锁定在电磁感应透明共振峰上，用该物理系统实现了闭环锁定的实验室桌面CPT频标实验系统。

The first one is to use phonetic analysis to delimit the vowel formant ranges of and allophonic and then we categorize the vowels which perceptually sound like 's according to the vowel formant ranges.

三种方法分别为：第一，利用声学中母音共振峰来找出/u/和/o/的共振峰范围，根据这一范围，进而将听觉上认为是/o/的音归类，结果发现仍有包含/o/的字。

There are some spurious peaks and merging peaks in conventional formants extracted by LPC.

传统线性预测编码算法在提取语音共振峰时存在虚假峰和合并峰的问题。

The authors analyze the questions of pole interaction while extracting formants. A new LPC improved algorithm based on pole interaction by arranging their order of poles is proposed in this paper. The experimental results show that the new algorithm can solve the two questions and it can extract the first three or four formants of whisper speech.

本文分析了共振峰提取中存在的极点交叉问题，通过对极点排序，提出基于极点交叉的LPC改进算法，从而有效解决这两个问题，实验结果证明此算法能够根据实际要求准确提取耳语音的前三个或前四个共振峰。

Results In 60 patients with organic diseases of vocal cords, all the acoustic parameters were significantly increased and the spectrograph showed irregularity,breakage or lack of harmonic waves and formants, and increase of noise. In 50 cases with functional voice disorder, the shimmer and NNE were significantly increased but the jitter was usually normal. The spectrograph showed pathologic changes of harmonic waves and formants in middle and high frequencies.

结果 60例器质性声带疾病嘶哑嗓音表现各项声学参数均值高于正常，差别有统计学意义；声谱图特征为谐波及共振峰不规则、断裂甚至消失，噪声成分增加等。50例功能性发声障碍嗓音显示shimmer及NNE值较正常升高，声谱图主要表现中、高频区谐波及共振峰病理改变，波纹不平稳、抖动等；94％(47／50)患者的嗓音信号中可发现正常声学特征。

We find that the localized waveguide transmission peak redshifts and becomes broader along with the layer distance D increasing.

本工作发现随着板间距D 的增大，局域波导共振峰发生红移，同时峰的宽度明显变宽。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。