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The Generation and Dissemination of the Sound of the Basic Knowledge of Architectural Acoustics

Date of release:2019-04-30 Author:岩棉吸音板 Click:

Sound is the vibration in the "elastic" medium felt by the human ear. It is a rapid and slight fluctuation of pressure.

Sound generates vibration with objects, rock wool sound absorbers such as speaker cartons, plucked strings and so on. These vibrating objects are called sound sources. After the sound source is produced, it must pass through a certain medium to spread outward. This medium can be gas, liquid and solid. After being disturbed by the vibration of sound source, the molecule of the medium also vibrates, thus the combined energy propagates outward. But it must be pointed out that the molecule of the medium only oscillates back and forth near its equilibrium position before it is disturbed, and does not move outward with the sound wave. The vibration of the medium molecule is transmitted to the vibration of the human eardrum, which eventually generates the sound sensation through the auditory nerve. For example, the speaker carton will vibrate when the voice coil passes through an alternating current. This kind of vibration leads to the change of the dense state of the air particles, and then propagates along the medium to the far particles, and finally reaches the receiver. In the process of sound wave propagation, the vibration direction of the air particles is parallel to the propagation direction of the wave, so the sound wave is longitudinal wave.

Two, cut

It is necessary to cut the sound absorption board in the construction. It is suggested that steel ruler or alloy square steel be used as the ruler (not wood or soft material as the ruler) to avoid the splicing gap being too large or distorted due to the non-straight cutting line. In order to reduce the joint gap, the blade can be inclined inward by 0.5-1 mm during cutting, which makes the interface form an inclined plane. It is easy to face plate in construction and reduces the gap.

3. Selection of Blades

Because of the quality of domestic artistic blade steel and other reasons, glass fibre ceiling blade is not sharp enough and has short service life. It is easy to produce wool edge or wool surface when cutting or chamfering, especially when chamfering, so it is better to adopt imported high quality blade, chamfering can use the special chamfering planer of this product.

IV. Base Surface Treatment

The base surface should be flat. When the cement base surface is directly pasted, the batch scraping of the base surface should be done first, and then the sound absorption board should be pasted. If the cavity installation is needed, the perforated base plate or the wooden strip seam can be used for the installation to retain the full cavity. In order to enhance the sound absorption effect, the cavity can also be filled with sound absorption cotton.

5. Selection of glue for pasting

First, consider using glue that meets the national environmental protection requirements.

Different types of adhesives can be selected according to different base surfaces.

1. Cement or wood base: Benzene-free universal rubber or white latex with chloroprene rubber as raw material can be selected.

2. Base surface of paper gypsum board: white latex or cellulose wallpaper glue can be selected on the premise of not easily damp (after brushing and pasting, it should be fixed with nails immediately to avoid drying glue and moving board surface), and universal glue can be selected on the premise of being easily or possibly damp. Sound absorption board is a porous board, which is easy to absorb glue and plug holes. It is suggested that one-sided glue brushing should be used during construction (only on the wall, the amount of glue brushing is slightly thicker than normal). It can also be reinforced with nails.


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Key word:玻纤天花板,无机复合大板,岩棉吸音板

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