Views: 0 Author: Site Editor Publish Time: 2025-04-30 Origin: Site
Noise refers to sound waves of various frequencies and intensities, which are randomly and haphazardly combined and change in an irregular manner.
Simply speaking, any sound that is annoying, unnecessary or harmful to health is called noise.
The main sources of urban noise include construction noise, traffic noise, industrial noise and social life noise.
How is the magnitude of noise evaluated? Decibel - a unit used to indicate the relative magnitude of sound intensity or power (symbol: dB).
01 Very quiet
The noise intensity ranges from 0 to 40 dB, which can provide a relatively comfortable living and working environment.
02 General
40 to 70 dB is equivalent to the sound intensity of a normal indoor conversation to Shouting loudly.
03 Irritability
A sound intensity of over 70 dB is already quite noisy and extremely intense.
The noise of household appliances such as washing machines and electric fans is generally below 80dB. The noise of a regular bus is approximately 80 decibels, while the noise from a car horn can be as high as 105 to 110 decibels.The noise in the general electronics industry and light industry is below 90dB, while that in textile factories may be between 90 and 110dB. The noise in the machinery industry is between 80 and 100dB, and the noise generated by equipment such as rock drills may be as high as over 120dB.
The decibel values of air conditioners usually vary depending on the type, power and model of the air conditioner. According to the search results, the noise decibel level of household air conditioners is generally as follows:
Split air conditioners: Generally, the noise decibels of the indoor unit are between 30 and 50 decibels, and those of the outdoor unit are between 40 and 50 decibels.
Central air conditioning: The noise decibels of the indoor unit are generally between 40 and 60 decibels.
At specific Settings, the noise decibels of the air conditioner will also vary. For example, when an air conditioner operates at different temperature Settings, the noise decibels may be as follows:
Zero to twenty degrees: 55 decibels
Between 20 and 30 degrees: 60 decibels
Between 30 and 40 degrees: 65 decibels
Forty degrees: 75 decibels
Fifty degrees: 85 to 90 decibels
Sixty degrees: above 95 points
It should be noted that the national standard stipulates that the noise standard for split air conditioners is that the indoor unit noise should be less than 48 decibels and the outdoor unit noise should be less than 58 decibels. The noise level requirements for other air conditioners vary depending on their horsepower, but the maximum must not exceed 68 decibels.
The decibel value of a ceiling fan usually depends on its size and design. According to the search results, the noises of ceiling fans of different specifications are as follows:
The fan blade specification should be less than 900mm, and the noise should be less than 55dB(A).
The specifications of the fan blades range from 900 to 1050mm, and the noise should be less than 58dB(A).
The fan blade specifications should be between 1050 and 1200mm, and the noise should be less than 62dB(A).
The fan blade specifications should be between 1200 and 1400mm, and the noise should be less than 66dB(A).
The fan blade specifications should be between 1400 and 1500mm, and the noise should be less than 70dB(A).
The fan blade specification is greater than 1500mm, and the noise should be less than 75dB(A).
These data indicate that the noise level of ceiling fans under normal use is within an acceptable range for people and usually does not cause noise pollution.
