Common ways to reduce noise, how many ways to reduce noise?

What is the most effective way to eliminate noise in the car?

There are three ways to reduce noise.

1.Attenuation from the sound source: For example, if we hear a loud noise from the washing machine when we are using the washing machine to dry clothes, we can re-fold the clothes in the correct position and the noise disappears. Motor vehicles such as motorcycles, cars, etc., are equipped with mufflers.

2.Weaken from propagation: set up obstacles to reflect or absorb noise in the process of noise propagation, to achieve the purpose of reducing noise, the indoor wall is rougher, the fabric is used more, the wall facing the street is thicker, and the wooden furniture is placed more, which can have the effect of reducing noise, 3Weakened ears: Ground staff at airports wear earmuffs to attenuate the impact of noise. In order to avoid the interference of TV programs when we do our homework at night, we can also bring earmuffs, earplugs, or even cover our ears.

1) To reduce the noise of the sound source, the industry and transportation industry can choose low-noise production equipment and improve the production process, or change the movement mode of the noise source (such as damping, vibration isolation and other measures to reduce the vibration of the solid sound emitter).

2) Reduce noise, control the propagation of noise, and change the noise propagation path that has been emitted by the sound source, such as the use of sound absorption, sound insulation, sound barrier, vibration isolation and other measures, as well as reasonable planning of urban and building layout.

3) When measures cannot be taken on the sound source and transmission path, or the acoustic measures taken still cannot achieve the expected effect, it is necessary to take protective measures for the sound recipient or the sound receptor organ, such as workers who are exposed to long-term occupational noise can wear earplugs, earmuffs or helmets and other ear protectors.

What is the most effective way to eliminate noise in the car?

Noise reduction methods include: noise reduction at the sound source, sound insulation method to reduce noise, sound absorption method to reduce noise, muffler to reduce noise, use of personal protective equipment, etc.

1. Reduce noise at the sound source.

Reducing the noise of the sound source itself is the way to cure the root cause. For example, hydraulic pressure is used instead of stamping, helical gears are used instead of spur gears, and welding is used instead of riveting; Preventing and reducing the noise emitted by vibration can be solved by the structural modification process that plagues the coup unit.

2. Noise can be reduced by sound insulation method.

Acoustic insulation components separate the noise source from the receiver and isolate the propagation of airborne noise, thereby reducing the degree of noise pollution. Use appropriate soundproofing including partition walls, soundproof booths, acoustic covers, acoustic curtains and noise barriers.

3. Sound absorption method to reduce noise.

Acoustic materials or structures are used to absorb sound energy to reduce noise. If a material or structure has the ability to absorb sound energy, it is called a sound-absorbing material or sound-absorbing structure. The types of production absorption materials and sound-absorbing structures mainly include porous materials, Helmholtz resonators, perforated plate sound-absorbing structures, thin plate resonance sound-absorbing structures, and supple materials.

4. Reduce noise with Wang Hongdan sounder.

A muffler is a device that allows air flow through which sound energy is attenuated. It is usually used in airflow noise control, such as installing a muffler on the airflow channel of aerodynamic equipment, which can reduce the noise of the equipment, such as fan noise, ventilation duct noise blindness and exhaust noise.

5. Personal protective equipment to reduce noise.

In many cases, personal protection is the most effective and economical approach. Personal protective equipment consists of earplugs, earmuffs, ear pads, etc.

1. Install two doors in the entrance. In many old-fashioned houses, there are two doors, one opens inward, one opens outward, the inward is the anti-theft door, and the outward is the wooden door.

Clever use of wooden furniture. Experiments show that the porous properties of fibers in furniture can effectively absorb noise and reduce noise decibels, especially wood furniture has the best sound insulation effect. Placing wooden furniture next to a wall is a great way to reduce noise coming from next door.

3. Use double-glazed glass. When choosing windows, many families choose to install ordinary aluminum alloy single-layer glass windows, in fact, the installation of hollow double-layer glass can isolate about 80% of the noise from the outside world.

4. Wallpaper can also reduce noise. For wallpaper, many friends are friends with the attitude of beautifying the wall, in fact, wallpaper in the room can also effectively reduce noise. Wallpaper can reduce the range of noise propagation to a certain extent, especially the uneven and uneven wallpaper, change the direction of noise propagation, make the sound wave refracted many times, and greatly reduce the noise decibels.

5. Green plants can also reduce noise. In fact, it is not uncommon to use green plants to reduce noise, and the green belt on the street takes advantage of this principle. Putting some potted plants at home can not only reduce the noise of the car, but also green the air environment at home, especially the broad-leaved plants have the best noise reduction effect.

Method: 1. Seal the sound source and build a sound insulation wall at the sound source to prevent the noise from spreading directly outward.

2. Strengthen greening, plant trees on both sides of complicated highways, and form barriers.

3. Add soundproofing facilities.

4。Lubricate the machine to prevent noise and protect the machine.

5. Add a sound insulation device at the ear, such as a good earplug. Place them separately, try not to put electrical appliances in one room, and do not put them in or near the office if the sound pressure level is too high.

6. Eliminate noisy machines in time.

7. Raising flowers and plants can eliminate part of the noise.

Noise reduction principle: 1. Weaken at the sound source. Second, it weakens in the process of transmission. 3. Weakening of the receiving place.

The four ways to reduce noise are to replace curtains, glass, carpets, and greening, choosing thicker curtains and double-layer hollow glass can reduce noise by 40%, laying carpets can reduce the noise generated by human walking, and strengthening greening can reduce the noise intensity of the outside world.

How to reduce noise

1. Replace the curtains

nbsp;Noise reduction can take the form of replacing curtains. Most of the noise generated outdoors comes from the windows, so replacing the curtains in your home with thicker ones can block out 20% of the noise and reduce the noise.

2. Replace the glass

nbsp;Noise reduction can take the form of replacing the glass. Single-glazing is less effective at filtering noise, and the void between double-glazed insulating glass can isolate 40% of the noise, so replacing the glass in your home with double-glazed insulating glass can reduce noise.

3. Lay the carpet

nbsp;Carpeting also reduces noise. In addition to the noise that people hear from the outside world, it will also be generated between walking and activities, and laying carpets indoors can reduce the sound of footsteps and dragging tables and chairs when people are walking and moving.

4. Strengthen greening

In the process of growth, trees can absorb noise from the environment, so in order to prevent external noise from entering the room, green trees and flowers can be planted around the community or next to the street to play a role in sound insulation.