声学

A computer vocal acoustics test system (Dr.speech for Windows) was used to determine the voice quality of 66 patients with glottic laryngeal carcinoma.

应用计算机嗓音声学测试系统（Dr.speech for Windows）对66例声门型喉癌行半导体激光手术治疗后的患者进行嗓音测试，并对所测的声学参数值进行定量分析，判断所测的嗓音质量。

The development of speech sounds was investigated using the analysis framework of phonemic contrast in Putonghua-speaking children.

普通话言语的发展：言语清晰度、音位对比及声学特征本研究采用音位对比的分析框架研究讲普通话儿童的言语声的发展，研究中采用了临床中的两种角度：知觉任务和声学性质。

Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2 : dynamic stiffness of elastic supports for translatory motion - Direct method.

NF S31-030-2-2000 声学和振动。弹性元件振动声学传输性能的实验室测量。第2部分：平移运动用弹性支架的动态劲度。

Everyone has a very detailed subconscious knowledge of how different rooms sound, and although few are able to analyse the reverberation structure, most spot incongruities in artificial reverberation very easily.

通过不停的学习，你慢慢的基础过不同的真是声学空间，你的知识就越来越丰富，对于你创建一个模拟的声学空间就越容易。

The finite element method and electro mechano acoustic method are used to analyse the mechanical performance,sensitivity,and frequency response of the condenser microphone .

针对所研制的电容式微传声器在理想模式下的工作原理，建立了有限元分析模型和声电模型，从理论上分析了器件的机械性能、灵敏度以及频响特性，得出了结构优化的设计原则，即要想得到高灵敏度的微传声器器件，必须考虑采用尽可能小的空气隙厚度和声学孔尺寸以及具有较小内应力的声学振膜。

The same position of each of the first plurality of acoustic drivers and the same position of each of the second plurality of acoustic drivers may be the center of the dust cap.

所述多个第一声学驱动器的每一个的相同位置和所述多个第二声学驱动器的每一个的相同位置可以是防尘罩的中心。

ABSTRACT Theoretical analysis of the feed pipe inflow of self-excited pulsating and cavitating jet is given on the basis of fluid transient...

利用流体瞬变流和水声学理论分析了自激振荡气蚀射流喷管内的流动规律，建立了喷管内水声学特性的特征方程，并给出了数值解。

The low-frequency noise in the structure-acoustic field coupling system of high-speed train was simulated and analyzed.

对某高速列车拖车的仿真分析结果表明：该车声学测试点的总声压级超出了TB 1809—86标准拖车客室的容许噪声值；在某些计算频率下，车体某些部件涂敷阻尼材料后对客室测试点的声学贡献由小变大，这说明阻尼材料不仅改变了这些部件的振动幅值，同时也改变了振动相位。

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。

Meanwhile,it was pointed out in this paper that flexible pole-oilstone holder could be considered as a single vibrations system when designing acoustics subsystem,as pioneers a new in designing acoustics system of ultrasonic honing.

文摘：经试验证实了超声珩磨声学系统中存在着局部共振现象，指出&挠性杆-油石座&振动子系统设计时可作为一个单独的振动体系进行考虑，为超声珩磨声学系统设计开辟了一条新的思路。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。