In recent years, in the handling of complaints from the masses of complaints, the number of noise disturbances in the disco and bar has increased rapidly, and the response has been particularly strong. Since these disco bars are generally located in the downtown area, most of them are located on the ground floor of the residential building. The peak hours of business are just the time when people need to rest in the middle of the night, bringing infinite troubles and troubles to the residents.
How to do the low frequency vibration damping of the bar? The first thing to know is the source of the bar noise.
First, the bar sound source characteristics:
The music played in the bar is usually driven by a high-power subwoofer speaker. The volume it releases is about 105~125dB(A), and the basic low frequency range is 63~125Hz. This low-frequency sound wave penetration ability is strong. The distance of propagation is long and the attenuation coefficient is low. It can usually be uploaded to the residents of each floor of the building along the structure of the column. The sound of the ground floor can reach the top floor.
Second, bar noise management:
The noise characteristics of bars make it difficult to manage:
1. Low-frequency sound waves have a strong penetrating ability, and it is difficult to offset the thickness of the muffler cavity required for the wavelength in architectural design and decorative design;
2. Each bar hall is a hexahedron. The range of control needs to be too large. It is difficult to reduce the vibration of a single floor. If the sound from the speaker is lowered, the bar will lose customers because there is no shock effect. .
Third, the bar noise reduction treatment:
(1) Elimination of low frequency vibration
The sound field in the bar is basically derived from the speakers. There are several sound sources in several speakers, and there are several spherical sound waves. In the way of transmission, the speaker can transmit sound waves through hanging hangers, top beams, columns, walls, sewer pipes, doors and windows, and exhaust ports. It is quite difficult to control the bar in the middle of the residential building, especially in the middle of the high-rise building, and the necessary vibration and sound insulation must be carried out from all points and surfaces to meet the design requirements.
1. Install the speaker damper or vibration damper. Bar speakers are usually placed on the ground or suspended around the beam. When playing strong music, the speakers produce a collision with the music frequency on the ground, beams or slabs, and then transmit them to the upstairs residents in the form of solid sound. Therefore, it is necessary to use the cushioning damping system and the form of adding the damping hook to isolate the vibration of the point source from the building joint.
2. The vibration damping layer and the sound insulation layer are added to the beam column and the floor. After the sound wave of the speaker is emitted, the sound wave generates high-energy vibration in the air, and a wave of waves impacts the wall beam and the floor slab. The low-frequency part can penetrate the cement wall and quickly upload into the residential room. Therefore, it is necessary to add an elastic surface layer or a sound-absorbing hollow resonance layer to the main beam, the main column and the floor to eliminate the impact of high-energy sound waves on the main beam, the main column and the floor.
3. Add a damping layer and an acoustic layer to the fire pipe and the sewer pipe. The downpipes of high-rise buildings are generally concentrated in the storefront. The sound waves of the bar can be directly transmitted to the households through the thin wall of the water pipes. Therefore, the sewer pipes connected to the upper-floor residents must be re-wrapped, and the inner layer is covered with a damping damping layer. The layer is covered with a sound barrier and a soft joint must be added in the middle.
(2) Reducing the leakage of sound waves
Bars are generally located near residential areas. Access doors, fire doors, and air conditioning vents may become the release and leak points of bar sound waves, affecting nearby residents.
1. The bar entrance and exit channel is designed as a “sound gate†structure. In reality, most of the bars have only one door. No matter how good the sound insulation performance of the door is, the sound waves in the bar will inevitably leak when the guests enter and exit the switch. Therefore, the design should be installed with a soundproof door at a distance of not less than 1.5M from the original gate. The purpose is to enable the first door to be closed when the guest opens the second door, and the sound waves cannot be released.
2, door joints, thresholds, door touches reduce leakage. Excessive door gaps greatly reduce the sound insulation effect of the door. Therefore, it is necessary to design a closed structure with rubber strips in these parts. The compression of the rubber strip and the compression deformation of the air ensure that the sound waves cannot leak from the gap.
3. Install a broadband muffler at the exhaust port. The air conditioner and exhaust port will bring out the noise together during the discharge process. A composite muffler must be installed to eliminate the high, medium and low broadband sound waves in the muffler without affecting the normal exhaust.
4. Add a soft sound pack to the bar. Bar wall, sofa, and seat should use sound-absorbing materials to reduce the sound pressure of the indoor sound field, and also adjust the bar volume tone to be more harmonious.
The above is some of the experiences on sound insulation that have been summarized in the practice of decoration design for many large-scale entertainment venues for many years. I hope to provide some reference for friends who are ready to invest in the bar.
Integrated Rimless LED Panel Light includes round and square two shape frame. We are the manufacturer of producing energy saving interior lighting. These trimless led panels has built-in driver and external driver. The frame shell is made of PC material. There are three color temperatures with cool white, warm white and natural white of panel lights. It has both concealed and surface mounted installation way. The unique features of led trimless light are: CRI>80, PF>0.5. These panels are mainly apply to home, office and school, etc.
LED Integrated Panel Light Series
Led Panel rimless Light,Interior Led Integration Light ,Led Integrated Light ,Round Rimless Integrated Lamp
Jiangmen Lika Lighting Electrical Appliances Co., Ltd , https://www.lika-led.com