How big is the low frequency shock absorbing pad in the bar?

Low-frequency shock absorbing pads are not as good as the shock absorbing benches of professional noise companies. However, the shock absorbing pad is cheaper, and the bench is more expensive.

On this issue, we consulted Mr. Zhao of the soundproof felt factory (with soundproof felt, the number of 136, the middle is 8106, and the back is 4123) soundproof felt is a kind of impermeable solid material, which has a soundproof effect on the sound waves transmitted in the air, and the most fundamental point of the soundproofing effect depends on the quality of the material per unit area.

The bass must be treated strictly, including the corners and ventilation ducts at every corner. Usually the denser the material, the better the sound insulation, that is, the heavier the guy, the better. If space permits, we will recommend a room-within-a-room form; Make sure the bar doesn't affect the surrounding residents.

1. Ceiling: vibration damping hook + keel + sound-absorbing cotton + soundproof felt + soundproof board, if the sound source is larger, the ceiling needs to be double-layer soundproof ceiling.

2. Wall: heaven and earth keel + sound-absorbing cotton + soundproof felt + soundproof board, if the sound source is larger, the wall needs to be double-layer sound insulation.

3. Ground: soundproof felt + shock absorbing pad + concrete.

4. Reasonable layout of speakers to reduce mutual interference. Do not hang the speaker directly on the wall or on the ground, you can use an elastic hook or vibration damping pad to make the speaker and the building flexibly connected.

5. Replace doors and windows with soundproof doors and windows, and pay attention to good sealing.

In the construction and operation of night clubs, the over-reliance on electro-acoustics and the over-emphasis on sound construction will lead to different degrees of sound quality problems. If the sound insulation and shock absorption of the bar are not handled well, it will bring a strong sense of vibration and noise. Jumao Acoustics makes the following recommendations:

1. The bar entrance and exit passage is designed with a "sound gate" structure. In reality, most bars have only one door, and no matter how well the door is soundproofed, it is inevitable that the sound waves of the bar will leak during the time when guests enter and exit the door. Therefore, the design should be at least the distance of the original door to add another soundproof door, so that when the guest opens the second door, the first door has been closed, and the sound wave can not be discharged.

2. Door cracks, thresholds, and door bumps reduce sound leakage. Excessive gap between the door gaps greatly reduces the sound insulation effect of the door, so it is necessary to use adhesive strips in these parts to design a closed structure, and ensure that sound waves cannot leak through the gaps through the adhesive strip compression and air compression deformation.

3. Install a broadband muffler at the exhaust port. Air conditioners and exhaust outlets will bring out the noise during the discharge process. A composite muffler must be installed to basically eliminate the high, medium and low frequency sound waves in the muffler without affecting the normal exhaust.

4. Sound-absorbing soft bags are added to the bar. Bar walls, sofas, and seats should be made of sound-absorbing materials to reduce the sound pressure of the indoor sound field, and at the same time, the volume and tone of the bar can be adjusted to be more harmonious and beautiful.

In terms of materials, shock absorbers, vibration absorbing glue, sound insulation panels, sound insulation felt, sound insulation cotton, etc. will be used.

Before preparing the boom, side keel, covered keel, bearing keel, cross brace keel, wall keel and other keels, it is necessary to ensure the installation quality of the keel. It is also necessary to ensure the dryness and cleanliness of the keel. When you're done, remove any extra screws and other excess.

Then measure the size of the space, and cut the Jumao acoustic soundproof board according to the size and structure of the room, the purpose of which is to reduce the indirect seam of the slag limb board. The cutting method can be knife carving and sawing. For acoustic panels with a large number of layers, it is better to use sawing because of the deep notches required.

After the cut is completed, be sure to smooth the trimmed edges and ends.

Jumao acoustic insulation panels: Cutting acoustic panels can be cut to the appropriate size. When using the cutting method, first use a tool knife to carve a scratch on either side of the sound insulation panel, then scratch the corresponding position on the other silver bright side, and finally break the sound insulation board along the notch. In addition to the cutting method, it can also be cut by sawing.

In order to minimize the gap between the butts of adjacent acoustic panels, the cutting edges should be kept as clean and parallel as possible, and smoothed if necessary. The sound insulation board is first combined with a layer of sound insulation felt, so that the sound insulation effect is better. Now the sound insulation board is widely used in the wide sound insulation of the front beam of the ground wall, which has the advantages of convenient construction and good sound insulation effect.

The longer side of the acoustic insulation panel should be vertically sub-keel, and the shorter side should be installed at a staggered seam. After installation, use sealant to fill the gaps and squeeze them appropriately to ensure that the gaps between the plates and between the walls are tight. After sealing, attention must be paid to the need to fix, for the wooden keel, the general use of the bell head coarse threaded screws, and the metal keel, the usual use of the bell head fine threaded screws.

When screwing in the screws, it is necessary to pay attention to screwing in vertically, so that it is flush with the surface of the sound insulation board, the sound insulation board, the sound insulation board, and the sound insulation board is intact. When installing the sound insulation panel, due to the strong permeability of sound waves, when hollowing out the position of wall attachments such as ceiling lamp holes, pipes, ceiling fans, etc., it is necessary to use celestial sound insulation sealant to seal the cavities and gaps caused by the installation.