为保证声绝缘与吸声效果，室内应铺有地毯天花板四周墙壁内都应装有隔音毯，窗户应采用双层玻璃，进出门应考虑隔音装置。
To ensure sound insulation and absorption, carpets should be laid indoors, and soundproofing blankets should be installed in the walls around the ceiling. Windows should be double glazed, and soundproofing devices should be considered for entrance and exit doors.
在多数情况下，室内场景音响系统接收到的是微弱信号，要把信号放大才能被听众(观众)听到。室内场景音响声频扩声的目的主要是：
In most cases, indoor scene sound systems receive weak signals that need to be amplified in order to be heard by the audience. The main purpose of indoor scene sound amplification is to:
提高清晰度和可懂度，以使讲话的每个词都十分清楚，而音乐伴奏不会喧宾夺主；
Improve clarity and intelligibility to ensure that every word in the speech is very clear, while music accompaniment does not dominate;
使整个听众席声音均匀分布，对所有座位要有均匀的响度，减少甚消灭“死区”；
Distribute the sound evenly throughout the audience, ensuring a uniform loudness for all seats, reducing or even eliminating "dead zones";
对整个听众席要有稳定的系统频率响应和均匀的“音色”；
There should be a stable system frequency response and a uniform "timbre" for the entire audience;
除保证声音的真实感和无污染的传播外，使语言和音乐有舒适空间,得到真实的表现。
In addition to ensuring the authenticity of sound and pollution-free transmission, it also provides a comfortable space for language and music to achieve authentic expression.
足够大的音量：
Enough volume:
音响扩声系统实际上是一个用电子技术实现声音重放的系统。系统中，音量是重要的，音量水平用声场的声压级来衡量。根据GB 50371-2006 《厅堂扩声系统设计规范》 ，在空场稳态准峰值状态下的声压级，多功能类扩声系统一级标准≥103dB。室内场景扩声音响系统能够达到多功能类扩声系统一级标准。
The sound reinforcement system is actually a system that uses electronic technology to achieve sound reproduction. In the system, volume is the most important, and the level of volume is measured by the sound pressure level of the sound field. According to the national GB 50371-2006 "Code for Design of Hall Sound Reinforcement Systems", the maximum sound pressure level in the steady-state quasi peak state of the open field is ≥ 103dB as the first level standard for multifunctional sound reinforcement systems. The indoor scene sound reinforcement system can meet the first level standard for multifunctional sound reinforcement systems.
均匀合理的声场分布：
Uniform and reasonable sound field distribution:
扬声器重放的声场要尽可能分布均匀，室内场景中，听音区声场声压要求分布均匀，重放声场分为动区和静区，舞台为动区，坐席为静区，动区的声压级显然应比静区的声压级大，否则坐席中的观众将难以忍受。虽然动静区之间声压不要求均匀，但各区之内声压应是尽可能均匀的。
The sound field replayed by speakers should be as evenly distributed as possible. In indoor scenes, the sound pressure in the listening area should be evenly distributed. The playback sound field is divided into dynamic and static areas, with the stage as the dynamic area and the seat as the static area. The sound pressure level in the dynamic area should obviously be higher than that in the static area, otherwise the audience in the seat will find it difficult to bear. Although the sound pressure between the dynamic and static zones is not required to be uniform, the sound pressure within each zone should be as uniform as possible.
良好的音质：
Good sound quality:
音质主要取决于系统的失真度和传输频率特性。系统的失真度是指由输入声信号或输入电讯信号到输出声信号全过程中产生的非线性失真。标准WH0301-93允许的非线性失真度为5%以下。
The sound quality mainly depends on the distortion and transmission frequency characteristics of the system. The distortion of a system refers to the nonlinear distortion generated throughout the entire process from the input acoustic signal or input telecommunication signal to the output acoustic signal. The nonlinear distortion allowed by standard WH0301-93 is below 5%.
传输频率特性视之系统达到可用增益时，室内场景各处稳态声压级平均值像对于扩声系统输入端信号电压的幅频响应。也就是频响。系统的非线性失真主要是由电声设备引起的。而系统的频响则除取决于电声设备的品质外还取决于厅堂和环境的建筑声学特性。音乐和语言的清晰度也是衡量音质的重要指标。
The transmission frequency characteristics are seen as the amplitude frequency response of the steady-state sound pressure levels at various locations in the indoor scene to the input signal voltage of the sound reinforcement system when the system reaches the highest available gain. That is, frequency response. The nonlinear distortion of the system is mainly caused by electro-acoustic equipment. The frequency response of the system depends not only on the quality of electroacoustic equipment, but also on the Architectural acoustics characteristics of the hall and environment. The clarity of music and language is also an important indicator of sound quality.
尽可能小的本底噪声：
Minimize background noise as much as possible:
噪声有两个来源，一是环境噪声，一是设备噪声。设备噪声用“总噪声”来衡量。总噪声是指扩声系统达到可用增益，但无有用信号输入时，厅堂内各测试点噪声声压级的平均值。这种噪声取决于设备的品质，另外线路的排布设备之间的连接方法屏蔽方法等都有重要影响。
There are two sources of noise, one is environmental noise, and the other is equipment noise. Equipment noise is measured by 'total noise'. Total noise refers to the average value of the noise sound pressure level at each Test point in the hall when the sound reinforcement system reaches the available gain but there is no useful signal input. This type of noise first depends on the quality of the equipment, and in addition, the connection method and shielding method between the equipment in the layout of the line have important impacts.
适当的传声增益：
Appropriate sound transmission gain:
适当的传声增益是现场扩声所必需的。扩声系统达到可用增益时，室内各处稳态声压级平均值与传声器处生压级的差值，叫做传声增益。简单地说就是听音处地声压级同话筒处的声压级之差。
Appropriate sound transmission gain is necessary for on-site sound reinforcement. When the sound reinforcement system reaches the maximum available gain, the difference between the average steady-state sound pressure level at various indoor locations and the generated pressure level at the microphone is called the sound transmission gain. Simply put, it is the difference between the sound pressure level at the listening point and the sound pressure level at the microphone.
良好的声反馈啸叫抑制能力：
Good sound feedback howling suppression ability:
当用话筒扩声时，室内的反射声会重新进入话筒，如果反射声的声级足够大就会产生声反馈啸叫。实际上，当声反馈条件满足时，不向话筒发话也会啸叫。这是因为在条件适当时，室内任何微小的声扰动，都会在寄生的声反馈通道中迅速发展成为啸叫。因此我们需要整个系统有尽可能良好的啸叫抑制能力。
When amplifying with a microphone, the reflected sound in the room will re-enter the microphone, and if the sound level of the reflected sound is large enough, it will generate sound feedback howling. In fact, when the acoustic feedback conditions are met, even without speaking to the microphone, it will howl. This is because under appropriate conditions, any small indoor acoustic disturbance will rapidly develop into howling in the parasitic acoustic feedback channel. Therefore, we need the entire system to have the best possible howling suppression capability.
良好的声像定位
Good audio image positioning
阶梯教室有演出任务或立体声节目播放等任务，就应考虑声像定位。
If there are performance tasks or stereo program playback tasks in a tiered classroom, audio and video positioning should be considered.
操控灵活可靠：
Flexible and reliable handling:
一个完整的系统会有多个信号源入口，多个扬声器出口和多种可选择的信号处理设备。再运行过程中应能根据现场需要随时切换，调节效果，修改参数，重新编组。
A complete system will have multiple signal source entrances, multiple speaker exits, and multiple selectable signal processing devices. During the re operation process, it should be possible to switch, adjust the effect, modify parameters, and reorganize according to on-site needs at any time.
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