With the development of urbanization and industrialization, people are increasingly exposed to noise in their daily lives. Noise is a harmful environmental pollution, how many decibels of noise are harmful to human health? This article will explore this issue.

Firstly, how is noise measured? We usually use decibels as the unit of measurement for noise. Decibel (dB) is a relative unit used to measure the intensity and volume of sound. The greater the noise, the higher the decibel level, and the maximum range of human hearing is 0dB to 140dB. 0-40 decibels is a very quiet environment, suitable for sleep; Normal living and working environment is around 40-70 decibels; A noise level above 70 decibels is very loud, and long-term living above 85 decibels can cause harm to human health. Generally speaking, for every 10 decibels increase, the level of noise pressure increases tenfold, and the intensity of sound also increases tenfold.

So, how many decibels of noise are harmful to the human body? According to the recommendations of the World Health Organization (WHO), long-term exposure to noise exceeding 85 decibels may lead to hearing loss and other health issues. Short term exposure to environments below 85 decibels is relatively safe, but if continued for several hours or days, it may lead to hearing loss. Generally speaking, humans are highly sensitive to noise levels up to 140 decibels, and prolonged exposure may lead to hearing loss, tinnitus, and other serious auditory problems.

In addition, the impact of different types of noise on the human body is also different. Both low-frequency and high-frequency noise can have varying degrees of impact on the human auditory system. High frequency noise is more likely to damage the inner ear of the auditory system, while low frequency noise is more likely to have psychological and physiological effects on the human body, such as causing symptoms such as headaches, dizziness, and insomnia.

Overall, long-term exposure to environments above 85 decibels may cause harm to the human body. Therefore, in daily life, we should try to avoid long-term exposure to noisy environments, such as wearing earplugs and other protective measures. In addition, the government and enterprises should also pay attention to noise pollution prevention and control, take effective measures to reduce environmental noise levels, and create a cleaner and healthier environment for the public.