消聲器是利用聲的吸收、反射、干涉等原理，降低通風與空調系統中氣流噪聲的裝置。根據消聲原理的不同可以分為阻性、抗性、共振型和復合型等。下面為大家介紹一下消聲器分類有哪些。

Silencers are devices that use principles such as sound absorption, reflection, and interference to reduce airflow noise in ventilation and air conditioning systems. According to the different principles of noise reduction, it can be divided into resistance, resistance, resonance, and composite types. Below, we will introduce the classification of mufflers.

　　一、阻性消聲器

1、 Resistive muffler

　　阻性消聲器利用吸聲材料的吸聲作用而消聲的。其構造是把吸聲材料固定在氣流流動的管道內壁，或按一定方式排列在管道或殼體內構成阻性消聲器，吸聲材料能夠把入射在其上的聲能部分地吸收掉。聲能之所以能被吸收，是由于吸聲材料的多孔性和松散性。

A resistive muffler uses the sound absorption effect of sound-absorbing materials to eliminate noise. Its structure is to fix the sound-absorbing material on the inner wall of the airflow pipeline, or arrange it in a certain way inside the pipeline or shell to form a resistive muffler. The sound-absorbing material can partially absorb the sound energy incident on it. The reason why sound energy can be absorbed is due to the porosity and looseness of sound-absorbing materials.

　　它對于高頻和中頻噪聲效果較好，但對低頻噪聲消聲性能較差。

It has good effects on high-frequency and intermediate frequency noise, but poor noise reduction performance on low-frequency noise.

　　二、共振型消聲器

2、 Resonant silencer

　　吸聲材料通常對低頻噪聲的吸收能力很低，單靠增加吸聲材料的厚度來提高吸聲效果并不經濟，為了改善低頻噪聲的吸聲效果，通常采用共振型消聲器。共振型消聲器的形式是利用管道開孔與共振腔相連接，利用小孔處的空氣柱和空腔內的空氣構成了彈性共振系統，當外界噪聲頻率和此共振系統的固有頻率相同時，小孔中的空氣柱發生共振并與孔壁發生劇烈摩擦，摩擦可以消耗聲能，從而達到消聲的目的。

Sound absorbing materials usually have a low absorption capacity for low-frequency noise. It is not economical to improve the sound absorption effect solely by increasing the thickness of the sound absorbing material. In order to improve the sound absorption effect of low-frequency noise, resonant silencers are usually used. The form of resonant muffler is connected to the resonant cavity through a pipeline opening, and an elastic resonance system is formed by using the air column at the small hole and the air inside the cavity. When the external noise frequency is the same as the natural frequency of the resonance system, the air column in the small hole resonates and experiences severe friction with the hole wall. Friction can consume sound energy, thereby achieving the purpose of noise reduction.

　　這種消聲器具有較強的頻率選擇性，即有效的頻率范圍很窄，一般對于低頻消聲可以產生較大的衰減。其氣流阻力小，但因有共振腔而使結構偏大。

This type of muffler has strong frequency selectivity, that is, the effective frequency range is very narrow, and generally can produce significant attenuation for low-frequency noise reduction. Its airflow resistance is small, but the structure is larger due to the presence of a resonant cavity.

　　三、抗性消聲器

3、 Resistance silencer

　　抗性消聲器由管和小室相連而成，該消聲器使利用風管截面的突然改變而使聲波向聲源方向反射回去而起到消聲作用。

A resistance muffler is composed of a tube connected to a small chamber, which uses a sudden change in the cross-section of the air duct to reflect sound waves back in the direction of the sound source, thus playing a silencing role.

　　該消聲器對中、低噪聲有較好的消聲效果，結構簡單，由于不使用吸聲材料，因而不受高溫和腐蝕性氣體的影響。低頻噪聲有一定效果。

This muffler has a good noise reduction effect on medium and low noise levels, with a simple structure. As it does not use sound-absorbing materials, it is not affected by high temperatures and corrosive gases. Eliminating low-frequency noise has a certain effect.

　　四、復合型消聲器

4、 Composite muffler

　　復合型消聲器集中了阻性和膨脹型消聲器的優點，對低頻到高頻區噪聲均具有良好的消聲效果。此外對于不能使用纖維吸聲材料的空調系統（如凈化空調工程），用金屬（鋁等）結構的微穿孔板消聲器可獲得良好的效果。

Composite silencers combine the advantages of resistive and expansion silencers, and have good noise reduction effects in the low-frequency to high-frequency range. In addition, for air conditioning systems that cannot use fiber sound-absorbing materials (such as purification air conditioning engineering), using micro perforated plate silencers with metal (aluminum, etc.) structures can achieve good results.

以上是關于 山東通風管道加工 的介紹，若想了解相關知識可請點擊：http://m.pvcbox.cn 我們將會全心全意為您提供滿分服務，歡迎您的來電！

The above is an introduction to the processing of ventilation ducts in Shandong. If you want to learn more about related knowledge, please click: http://m.pvcbox.cn We will wholeheartedly provide you with full score service. Welcome to call us!

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