Martin sets the standard for acoustic guitars, and since 1833 has been a leader in guitar innovation and craftsmanship.
马丁规定的标准，吉他，和1833年以来一直是领先的创新和工艺吉他。
It is significant to study experimentally the quantized acoustoelectric current for the transport of single electron driven by the surface acoustic wave. One of its possible applications is the development of a fundamental standard of electrical current linking the ampere to the elementary charge and frequency.
摘 要：研究表面声波单电子输运器件中的量子化声电电流对于揭示表面声波驱动的单电子输运特性有重要意义，并且有可能应用于量子电流基准，从而把安培与基本电荷和频率联系起来。
One, serve as a signal generator with computer, the software of COOLEDIT of sine sound wave that produces a standard is software of the acoustic frequency processing with a kind of powerful function and editor, it can be generated, broadcast the voice that with transcribe we need, the weaveform that can show phonate news undertakes study for us, be acoustics research and acoustic frequency processing
一、用电脑作为信号发生器，产生标准的正弦声波COOLEDIT 软件是一种功能强大的声频处理和编辑软件，它可以生成、播放和录制我们所需要的声音，并可以显示出声音的波形供我们进行探究，是声学探究和声频处理的得
According to the degrees of PSC they have, Shanghai-accented Mandarin interlanguage are classified into four stages as elementary, intermediate, intermediate-advanced and advanced. Then the phonologies of Standard Mandarin and Shanghai-accented Mandarin interlanguage are compared in order to find out the phonological differences between these two dialects. Based on the statistical results, the writer chooses ten typical kinds of pronunciation errors of finals according to the rates of pronunciation errors of finals on stages. Then, the phonetic level analysis is made on them for the four stages respectively. Furthermore, acoustic features of vowels, diphthongs, triphthongs and vowels with nasal endings are analysized and compared by plotting vowel charts and formant patterns for them. Finally, the writer gets some preliminary results of the typical pronunciation errors of finals during the whole process of Shanghai-accented Mandarin interlanguage and on the stages of it respectively.
本文结合当前这种实际研究和应用的需要，以上海地区普通话过渡语为考察对象，从韵母发音偏误入手，借鉴第二语言习得研究中偏误分析和中介语研究的相关理论，采用实验语音学的方法，随机选取了80位上海地区不同普通话水平等级的应试人的应试录音和试卷作为本研究使用的语料，并将其分别对应于上海地区普通话过渡语的四个阶段，重点考察这80位处于不同阶段的应试人在测试的读单字部分的韵母发音偏误现象，通过对各阶段所有应试人的各类韵母发音偏误出现率的统计分析，展示出上海地区普通话学习者在韵母习得方面产生的偏误在过渡语各个阶段上的分布特点及趋势；再根据各阶段各韵母发音偏误率的统计结果，选取各阶段共同具有的十类主要的韵母发音偏误，分别绘制过渡语各阶段的偏误音声学元音舌位图或共振峰模式图，并与标准普通话中相应韵母的声学元音舌位图或共振峰模式图进行比较，从而展示出上海地区普通话学习者的主要韵母偏误类型在过渡语不同阶段上各自的声学特征、偏离标准音的程度和相关趋势，并从一定程度上反映了这一地区普通话学习者在韵母习得方面的能力发展轨迹，为普通话教学及培训中如何提高教学效率问题提供一定的参考依据，也为普通话水平测试各等级标准声学特征的建立，乃至为将来测试的计算机化提供了可靠的声学参数。
M2C as simple coaxial speaker: they are, in fact, theintegration of an M2S system into a single speaker, as always without compromising on the selection of materials, and maintaining thehighest levels of music quality and power. The result is a range of four speakermodels with extremely high acoustic performance and simple to install, owing to a`basket` format adaptable to all standard speaker housings.
仅仅把M2C的喇叭称为同轴喇叭是不够的，它是把M2S套装喇叭浓缩在一只喇叭单体里，优良的材质，高水平的音质及功率，使M2C的四款喇叭能被方便地安装在各种喇叭位并能表现出良好的音效。
Methods The ERP components were detected in 22 depressed patients and 20 healthy subjects were required to press the keying when they experience a rare acoustic stimulus, and were not required to press the keying when they experience a standard acoustic stimulus, the Nogo-P300 potential were collected during the Nogo response, the Nogo-N2 and Nogo-P3 were collected during the ERP, the latencies and amplitudes of the Nogo-N2 and Nogo-P3 were measured.
对22例抑郁症患者和20例健康者进行ERP检测，受试者需对稀有声刺激执行按键反应，对标准声刺激不执行按键反应，从Nogo反应中可获得Nogo-P300波形，Nogo-N2、NogoP3即出现于Nogo-ERP波形中，对Nogo-N2、Nogo-P3的潜伏期、波幅进行比较。
This paper presents a quantificational evaluation to a specified high standard odeum via measuring on some main acoustic parameters.
通过对一个演出规格较高的音乐厅主要声学客观参数的测试，给出了该音乐厅定量的音质评价。
ADAMAS II Models were introduced in 1981 with the standard Ovation neck and bridge, and was available as acoustic electric only.
阿达姆斯二机型被推出，在1981年的标准鼓掌颈部和桥梁，作为电声只。
There was relationship between the NR and NCV, and there was little relationship between the NR and DCAN. Conclusion:Acoustic rhinometry is a new objective rhinometric method, but different race must have its standard respectively.
提示鼻瓣的意义不在于其位置，而在于其大小；鼻声反射测量为一种准确客观的鼻腔通气状态测量手段，但不同的人群应有不同的鼻声反射参数的正常值，注意了这一点才可以广泛地用于科研和临床。
At present, some traditional lab methods, including the standing wave tube method and the reverberation room method, are commonly used. The result of these measurements gives the acoustic absorption performance of the specimen in standard acoustic conditions and provides an important reference for its application.
目前，常用的测量方法（驻波管法和混响室法）属于实验室方法，其结果给出了待测样本在标准声学条件下的声学性能，为声学应用提供了重要的参考。
The effect of acoustic levitation on ultrasonic reducing friction A Standard Apparatus for Underwater Sound Pressure in High-frequency Range
声悬浮对超声减摩的影响高频水声声压标准装置
The test result indicates that at the acoustic frequency of 1~30 kHz, compared with the standard piezo-acoustic hydrophone, the frequency response of the FBG hydrophone is very flat and the SNR of output signal is good. The improved measures are in effect.
并将实验结果与标准水听器（压电型）比较，标定出FBG的声压灵敏度，在1～25KHz的声波检测范围，其响应平坦度好、信号输出稳定，改进措施是有效的。
Electro-acoustic equipment categories: electro-acoustic device test system, characteristics of piezoelectric transducer tester, test sensitivity sorting device, sound level meter, precision signal source Sweep, Sweep audio device, the standard sound source, standard test microphone, IEC318 Simulation of the ears, mouth simulation, speakers polarity tester, telephone analyzers, such as electro-acoustic type of testing equipment.
电声器件测试系统、压电换能器特性测试仪、灵敏度测试分选仪、声级计、精密扫频信号源、音频扫频仪、标准声源、标准测试话筒、IEC318仿真耳、仿真嘴、喇叭极性测试仪、电话分析仪等电声类测试仪。
Up till now, there is no accurate standard for the optimum acoustic impedance of the coupling medium.
目前国内超声医学界对最佳耦合剂声阻数值的选择尚无较为准确的说法。
Jaguar was the first manufacturer in the premium vehicle sector to introduce acoustic laminated glass as standard fit.
美洲虎是第一个高档汽车制造商介绍声波夹层玻璃行业标准健康。
How to measure the acoustic output of medical diagnostic ultrasonic equipments as per the requirement of the national standard is discussed here, and a new measuring system for it is introduced.
探讨了如何按照国家标准的要求测量医用超声诊断设备的声输出参数，并介绍了一种为此而研制的新型测量系统。
METHODS Nasal airway resistance, olfactory function, the morphological character of mucosa in nasal and sinus cavity after ESS were surveyed by anterior rhinomanometry, T & T olfactometer standard odors for measuring olfactory sense, acoustic rhinometry and scoring measure of mucosa.
方法采用声反射鼻腔测量系统、前鼻测压计、T&T嗅觉计定量检查法和术区黏膜评分法，对46例慢性鼻窦炎及鼻息肉患者鼻气道阻力、嗅觉、鼻腔术区黏膜形态进行测试。
After a white noise signal has been taken as the input of a standard sound source, a static acoustic test is conducted for a prototype silencer without air flow and at the normal temperature.
采用白噪声信号作为标准声源的输入信号，在常温无气流条件下对消声器实物模型进行了静态放声试验。
Overall, the road traffic noise of Harbin in 2015 will reach the standard and the condition of acoustic environment will be well.
推测出整体情况为，2015年哈尔滨市道路噪声水平将会处于达标的状态，整体交通声环境较好。
The ventilation and sound attenuation system are introduced to the standard building acoustic sound insulation lab to meet the requirement of sound power level measure of chair outlet's airflow noise for China National Grand Theater.
为测量国家大剧院座椅下送风风口气流噪声声功率级，对已有的标准建筑隔声实验室的接收室进行改造，引入通风系统，同时进行消声处理。