北京市音响设备厂

For general indoor home audio playback, playback quality is characterized by soft and delicate appearance, more exquisite and beautiful, playing the sound pressure level is not too high, bear power is relatively small, but also a small range of sound propagation.

而专业音响一般情况下指的是用于歌舞厅、卡拉OK厅、剧场剧院、会议室和体育场馆等专业文娱场所，根据场所不同，所声音的要求不同，场地大小等各种因素，配置不同场所的音响系统解决方案。

The professional audio generally refers to the dance hall, Cara OK hall, theater, conference rooms and stadiums and other professional entertainment, according to different places, the sound of the requirements are different, the size of the venue and other factors, the sound system configuration solutions in different places.

家用音响

Home audio

常见的家用音响系统配置组成

Common configuration of home sound system

1、音源：即声音的来源，家用音响系统中常见的音源如CD机、LP机、DVD机等。

1, source: the source of the sound, the sound of common home audio systems such as CD, LP, DVD etc..

2、放大设备：为了有效大功率推出扬声器发声，音源输出的信号一般要进行功率放大，现常见的放大设备为AV功放，一般都为晶体管功放，但现在一些发烧友也钟情于电子管放大器。

2, amplifying equipment: in order to effectively produce loudspeakers, the signal of sound source output usually needs power amplification. Now the common amplifying devices are AV power amplifiers, which are generally transistor power amplifiers, but now some enthusiasts also love electronic tube amplifiers.

3、还音设备：即音箱，其性能的好坏将直接影响到听音效果。

3, the sound equipment: that is, the sound box, its performance will directly affect the sound effect.

4、连接线：包括从音源到功放的连接线及功放到音箱的连接线。

4, connection line: including the connection line from the sound source to the amplifier and the connection line of the power amplifier to the sound box.

对家用音响系统的基本要求

Basic requirements for the home sound system

1

One

对家用音响设备的要求

Demand for home audio equipment

家用音响系统最终的追求目标是得到理想的听音效果，如在家中可欣赏到影剧院的音响效果。但家庭又不同于影剧院，因此对欣赏不同性质的音响，要求的声学效果也不一样，对流行音乐、古典音乐、轻音乐等要求能正确还原各种乐器，但对欣赏影片，却要求有音效的现场感、包围感等。

The ultimate goal of the home sound system is to get the ideal sound effect, such as the sound effect of the theater in the home. But the family is different from the theater, so the appreciation of the different nature of the acoustics, acoustics requirements are not the same, for pop music, classical music, light music can correctly restore a variety of musical instruments, but to enjoy the movie, but a sound sense, the requirements of field surrounded by a sense of.

对音源,要注意不同音源最终会得到不同的音响效果(即使后面的设备完全相同)。

For sound sources, it is important to note that different sound sources will eventually get different sound effects (even if the equipment behind is the same).

对音箱的要求，功率可以小一点，因为家庭内使用一般不需大功率输出，但对音箱的灵敏度、指向特性、频响特性均应有较高的要求。

For voice box, the power can be smaller, because the use of the family usually does not require high-power output, but the sensitivity, directional characteristics and frequency response characteristics of speakers should be higher.

连接线是最容易忽视的，但事实证明，它们对音效的影响绝对不能忽略，其频特性、屏蔽特性一定要好。

The connection line is the most easy to ignore, but the fact proves that their influence on the sound effect can not be ignored, its frequency characteristics and shielding characteristics must be better.

2

Two

家用音响系统对听音环境的要求

The requirements for the sound environment of the home sound system

对普通家庭来讲，客厅即是听音室，由于受到客观条件的限制，无法再对听音环境的比例做出调整，但在现有尺寸的条件下，如何能使听音效果最佳便是考虑的问题：①听音环境的对称性，此对称性包括两个方面，即稽核对称与声学对称，几何对称及音响的设置均应呈几何对称形状。当然以听音出为参考点;声学对称指对称音箱附近的声学条件基本一致，包括声波的直射、反射以及对声波的吸收特性均应保持一致，这就要求装饰材料的选择、家具的布置均应满足听音的良好声学特性。

For ordinary families, the living room is the listening room, due to the restrictions of objective conditions, not to listen to the music and the proportion of the environment to make adjustments, but in the size of the existing conditions, how to make the best sound effect is considered: listen to the sound environment of symmetry, the symmetry of including in two aspects, namely audit symmetry and symmetry of acoustic, geometric symmetry and audio settings should be geometrically symmetrical shape. Of course, to listen to the reference point; acoustic symmetry refers to acoustic condition symmetry near the speaker is basically the same, including direct, acoustic reflection and absorption characteristics of the acoustic wave should be consistent, which requires the choice of decoration materials, furniture layout should meet to good acoustic characteristics of sound.

专业扩声

Professional sound expansion

一般专业音响系统的配置组成

Configuration of a general professional sound system

1、音源(音乐播放设备、拾音设备、乐器等)

1. Sound sources (music playback equipment, pick-up equipment, musical instruments, etc.)

2、控制设备(模拟调音台、数字调音台、数字音频媒体矩阵、AV数字管理中心，后两者会议使用较多)

2, control equipment (analog mixer, digital audio mixer, digital audio media matrix, AV digital management center, the latter two meetings are more used)

3、周边设备(处理器、均衡器、压限器、分频器、激励器、延时器、效果器、反馈抑制器)

3. Peripheral equipment (processor, equalizer, pressure limiter, frequency divider, actuator, delay device, effect device, feedback suppressor)

4、还原设备(扬声器系统、功率放大器)。

4, reducing equipment (loudspeaker system, power amplifier).

5、连接线(以上设备由各种类型不同的线材、光纤目前使用也越来越多。)

5, the connection line (above equipment is used by various types of wire, fiber, more and more. )

专业音响系统所设计到专业术语

Professional sound systems are designed for professional terms

1、声压级：指实际声压和基准声压之比的20倍对数值，单位是分贝。是一项衡量音响系统的发声情况、扩声场所的声学质量指标的重要指标。

1, sound pressure level: refers to the actual sound pressure and the reference pressure ratio of 20 times the value of the unit is decibels. It is an important index to measure the sound condition of the sound system and the acoustics quality index of the sound expansion place.

2.扩声功率：扩声功率是指达到系统设计的额定扩声声压级时，扩声设备所需的额定功率。它的单位是瓦。是声学指标在电声参数上的直接体现，而且它将关系到工程的最终造价，所以也特别重要。

2. sound amplifying power: sound amplifying power refers to the rated power required by the sound expansion equipment when the rated sound pressure level of the system is rated. Its unit is watt. It is the direct embodiment of the acoustic parameters on the electroacoustic parameters, and it will be related to the final cost of the project, so it is also particularly important.

3.哼声：50赫兹市电交流声，因为声音为低频与哼声相仿而得名，音响设备的电源纹波系数过大和抗干扰性能不良等均会导致哼声。

3.: 50 Hz AC hum sound, because the name sounds for low frequency hum with similar power supply ripple coefficient of audio equipment is too large and poor anti-interference performance will lead to hum.

4.纯音：正弦信号的声音，在听觉上是具有明确单一声调的声音，如音叉发出的声音。

4. pure tone: the sound of a sinusoidal signal, a sound with a clear single tone in the hearing, such as the sound of a fork.

5.互调失真：互调失真指两个振幅按一定比例(通常为4：1)混合的单音频信号通过重放设备后产生新的频率分量的一种信号失真。

5. intermodulation distortion: intermodulation distortion refers to a signal distortion of two amplitude single tone signals mixed by a certain proportion (usually 4:1) by reproducing the new frequency components.

6.倍频程：两个频率相比为2的声音间的频程，一倍频程之间为八度的音高关系，即频率每增加一倍，音高增加一个倍频程。

The 6. octave: the frequency of two frequencies compared to 2, and the pitch relation between eight octave frequencies, namely, the doubling of frequency and the increase of pitch to one octave.

7.分频器：音箱内的一种电路装置，用以将输入的音乐信号分离成高音、中音、低音等不同部分，然后分别送入相应的高、中、低音喇叭单元中重放。

7. divider: a circuit device in the loudspeaker, which is used to separate the input music signals into different parts, such as tweet, alto and bass, and then send them to the corresponding high, medium and woofer units.

8.双放大器分音：音箱的每一只喇叭单元由一个独立的放大器通道来进行驱动的一种连接方式。一对两分频的的音箱需要使用两台立体声功放和两对喇叭线。见“双线分音”。

8. double amplifier: a mode of connection for each speaker unit of a sound box that is driven by an independent amplifier channel. One to two frequency divider needs to use two stereo power amplifiers and two pair of horn lines. See "double line".

9.双线分音：用两套喇叭线分别传送音乐信号的高、低音部分的一种接线方式。双线分音需要使用具备两对接线端子的专门设计的音箱。

9. double line: a connection of the high and low pitch parts of a musical signal with two trumpet lines. The double line division requires the use of a specially designed sound box with two pairs of terminals.

10.放大器：前置放大器和功率放大器的统称。

10. amplifier: the general name of the preamplifier and the power amplifier.

11.功率放大器：简称功放，用于增强

11. power amplifier: abbreviation power amplifier, for enhancement