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Anonymous users2024-02-15Various noise decibel value tables.
Sound Noise level (a) affects people.
Rocket missile launches 150-160
Jet aircraft vents 130-140 are unbearable.
Propeller aircraft, anti-aircraft machine guns 120-130 hurt.
Diesel engine, ball mill 110-120
Looms, chainsaws 100-110
Trucks, noisy roads 90-100 are noisy.
Loud-talking, noisy neighborhoods 70-80 are noisy.
Generally speaking 60-70
Ordinary rooms 50-60 are quieter.
Quiet night 30-40
Whisper softly 20-30 quiet.
Anechoic (10-20 very quiet indoors.)
Lower limit of hearing) 0-10 Hearing (0) (1) In order to protect people's hearing and physical health, the allowable value of noise is 75 90 decibels.
2) To ensure conversation and communication, the allowable value of ambient noise is 45-60 decibels.
3) For sleep time is recommended at 35-50 decibels.
Interferes with sleep and causes tiredness.
The harm of noise to sleep: sudden noise at 40 decibels, can wake up 10 people, and when it reaches 60 decibels, it can wake up 70 people.
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Anonymous users2024-02-1450 decibels is noise. According to the relevant national standards, the noise in residential areas should not exceed 50 decibels during the day and 45 decibels at night. When people fall asleep in an environment of 50 decibels, it will affect the quality of sleep, and symptoms of frequent breathing and nervous excitement will occur, which will lead to insomnia and dreams in the long run.
50 decibels is noise. According to the relevant national standards, the noise in residential areas should not exceed 50 decibels during the day and 45 decibels at night. When people fall asleep in an environment of 50 decibels, it will affect the quality of sleep, and symptoms of frequent breathing and nervous excitement will occur, which will lead to insomnia and dreams in the long run.
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Anonymous users2024-02-13Brand model: Huawei MateBook D15
System: Windows 11
Software Version: <
50 decibels is noise. A noise level of 30 to 40 dB is a relatively quiet normal environment; 50 decibels can affect sleep and rest. Due to insufficient rest, fatigue cannot be eliminated, and normal physiological functions will be affected to a certain extent; More than 70 decibels interfere with conversation, causing upset, lack of concentration, affecting work efficiency, and even accidents; Long-term work or living in a noise environment above 90 decibels can seriously affect hearing and lead to the occurrence of other diseases.
30 decibels: the volume of the whisper; 40 decibels: the hum of the refrigerator; 60 dB:
the sound of normal conversation; 70 decibels: equivalent to walking in the downtown area; 85 decibels: cars on the road; 95 dB:
the sound of the plane taking off; 150 decibels: The sound of fireworks.
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