查询词典 audio frequency

Audio devices performances in playback are evaluated by their frequency response in the whole audio frequency range.

音频设备对于信号的重放能力是由其频率响应特性来衡量的。

Currently, digital TV mainly has about seven chips, like Signal demodulator chip, video-control chip, MPEG-2 decode chip, video processing chip, HDMI interface chip, audio frequency treatment chip and audio frequency amplification chip.

目前数字电视里主要芯片有信号解调芯片、视频控制芯片、MPEG-2解码芯片、视频处理芯片、HDMI接口芯片、音频处理与音频放大芯片，也就是大约7片IC。

The reader community covers audio frequency worker as the broadcasting station and television station, recording technician, monitor, audio frequency engineer and so on; amplifying system engineer worded in the theater, the stadium, the audiovisual education hall, the conference room; tuning personnel worked in the hotel, choric hall, the multi-purpose hall; and the acoustic fan and the music amateur and so on.

发行范围覆盖音频工程企业、影剧院、体育场、多功能厅、娱乐场所，电台、电视台、网站、科研院所、学校等领域内的工程商、音频工程师、录音师、调音师、学生等，以及音响发烧友和音乐爱好者等。

The research of the digital audio-frequency technique combining the embedded system has the extensive foreground, The digital audio-frequency equipments based on the embedded system have be attended all over the world because of its high ratio of sexual valence , the quickly development speed ,and etc.

结合嵌入式系统的数字音频技术研究有着广阔的前景，基于嵌入式的数字音频设备以其高性价比、日新月异的发展速度等优点受到世界各国的广泛关注，本文结合市场发展需要，提出了一个比较优化的解决方案，并从理论和实践两方面对该方案进行了分析和设计。

This text works at the applied design and research of the digital audio-frequency technique in the embedded operate systems, deeply discusses the design thought and the achievement method of the whole system in the software and hardware, put forward the transplantation project of transplanting the μ c/ OS-Ⅱembedded operate system into the ARM microprocessor, and the achievement method of the digital audio-frequency files of decoding in the software.

本文致力于数字音频技术在嵌入式操作系统中的应用设计和研究，深入讨论了整个系统的软硬件设计思想与实现方法，提出了μc/OS-Ⅱ嵌入式操作系统在ARM微处理器上的移值方案，以及数字音频格式文件在软件解码上的实现方法。

SINCE 2004 THE COMPANY HAVE BEEN DEVOTED TO THE SELLING AND SPREADING ON CHINESE MARKET OF SEMICONDUCTOR IC IN CONSUMPTION ELECTRONIC APPLICATION AREA SUCH AS ELECTRICAL SOURCE,AUDIO-FREQUENCY AMPLIFICATION, AUDIO-FREQUENCY DECODATION, LITHIUM-BATTERY CHARGEMENT PROTECTION, STORAGE AND SINGLECHIP.

公司从2004年开始致力于电源管理、音频功放、音频解码、锂电充电保护、存储器及单片机等消费类电子应用领域的半导体IC的销售及解决方案在中国市场的推广。

Simulation results show that, for the fixed sampling frequency, the error rises with the frequency increasing of periodic signal, and decreases with the attenuation time constant increasing of non-periodic signal. The sampling frequency determines the upper limit of appropriate frequency band directly. The research provides the basis for the selection of cutoff frequency in filter design.

仿真结果表明，在采样频率确定时，对于周期信号，计算误差随频率的增加而增大，而对于非周期信号，计算误差随衰减时间常数的增大而减小，采样频率大小决定了插值法用于分布参数模型的适用频带上限，该研究为滤波器设计中截止频率的选择提供了依据。

This experiment is in frequency adjustment X-mitter about that miniwatt frequency adjustment X-mitter operating principle, analyses the debugging making method and their installation, the microphone changes implication into an audible signal, wave an audible signal being modulated as a result of enlarging the day afer tomorrow being in progress to the carrier wave , producing frequency adjustment, by the fact that air wire launching the frequency adjustment electromagnetic wave to the outside , the radio set just can with frequency adjustment meet hear clear implication.

本毕业设计是关于小功率调频发射机工作原理、分析制作方法及其安装调试，在调频发射机中，话筒将话音转化为音频信号，音频信号经放大后对载波进行调制，产生调频波，通过天线向外发射调频电磁波，用调频收音机便可以接听到清楚的话音。

Two common methods of GPS signal coarse acquisition are analyzed and compared in this paper, and an optimized method is adopted. Two common algorithms of calculating fine frequency are analyzed and compared and the conics fitting is designed to calculate the fine frequency. Based on the distributing character of Doppler frequency shift, swing frequency style of Doppler frequency shift search is employed.

对比分析了两种常用的GPS信号粗捕获实现方法，设计了一种优化的实现方法；同时对常用的两种精细载波频率算法进行了比较分析，设计了一种二次曲线拟合的方法计算精细载波频率；基于多普勒频移的分布特点，改变以往顺序搜索的方式，采用跳频搜索的方法。

The traditional analog frequency-sweeping instrument, which mostly uses the LC circuit as the frequency oscillator, is more expensive, too much bigger and heavy to carry. It can only display the curve of amplitude-frequency, but can't used to measure the phase-frequency, and can't used to print the curve of frequency response characteristic either. It brings many discommodity to the user.

传统的模拟式扫频仪大多是用LC电路构成扫频振荡器，它不仅价格昂贵，体积庞大，而且只能显示幅频特性曲线，不能得到相频特性曲线，更不能打印被测网络的频响曲线，给使用者带来诸多不便。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。