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Post by account_disabled on Oct 25, 2023 6:17:21 GMT 2
Active Noise Cancellation uses a microphone to capture noise and produce an inverted signal. This opposite signal is then injected into the sound source, thereby removing ambient noise. The earphone battery lasts for hours for listening to music. But in the mode of listening to music and purifying the air at the same time, the device can only work for four hours. Headphones without a purifier weigh in grams, and headphones with a purifier weigh in grams. The headset went on sale in China in 2019, and the device will be available in the moible number data US, UK, Hong Kong and Singapore from 2019. what does that mean Air pollution is one of the major health problems. Long-term exposure to polluted air can lead to respiratory and cardiovascular disease, stroke and lung cancer. It also contributes to climate change, acid rain, and . Air pollution can adversely affect quality and life expectancy. According to the World Health Organization, the combined effects of outdoor and indoor air pollution cause 10,000 premature deaths each year. Noise pollution is another underestimated threat that can lead to health problems such as hearing loss, cardiovascular disease, stress and depression. According to a United Nations report, leading cities in terms of noise pollution include Dhaka (Bangladesh), Moradabad (India), Islamabad (Pakistan), Rajshahi (Bangladesh), Ho Chi Minh City (Vietnam) , Ibadan (Nigeria), (Nepal), Algeria. Noise levels in these cities exceed decibels. Journalists tested the headphones in New York.
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