Does electrical noise affect hearing health?

生活中有一类噪音源会被大家忽视，那就是家用电器产生的噪音。资料显示，在1米的距离内，音量放大的电视机、收音机、录音机的声级可达60－70分贝；电风扇为42－70分贝；电冰箱为34－50分贝；洗衣机转动时马达声为60－70分贝；电吹风为55－90分贝；电动剃须刀为47－60分贝；音响的声级更高达90分贝。由此可见家用电器的噪音不比马路上汽车喇叭的噪音低。

Home appliance noise is harmful

1. The noise of home appliances is harmful to children’s physical and mental health

Because children are immature, the tissues and organs are very delicate and fragile. Whether it is a fetus or a newly born child, noise can damage the auditory organs and cause hearing loss or loss.According to statistics, there are more than 7000 million deaf people in the world today, and a considerable part of them are caused by noise.Expert research has proved that indoor noise in the home is the main cause of children’s deafness. If living in a noise above 85 decibels, deafness can reach 5%.

2. Noise from home appliances interferes with rest and sleep

Rest and sleep are necessary conditions for people to eliminate fatigue, restore physical strength and maintain health.But the noise makes people uneasy, and it is difficult to rest and fall asleep.When a person is unable to fall asleep, he will get tense, short of breath, pulse beating, brain excitement, the next day will feel tired, or limb weakness, which affects work and study, and over time, will get neurasthenia , Manifested as insomnia, tinnitus, fatigue.

3. Noise from home appliances reduces work efficiency

Studies have found that noise exceeding 85 decibels can make people feel upset. People will feel noisy and cannot concentrate on work. As a result, work efficiency will be reduced.

4. Noise from household appliances can damage eyesight

人们只知道噪音影响听力，其实噪音还影响视力。试验表明：当噪音强度达到90分贝时，人的视觉细胞敏感性下降，识别弱光反应时间延长；噪音达到95分贝时，有40%的人瞳孔放大，视模糊；而噪音达到115分贝时，多数人的眼球对光亮度的适应都有不同程度的减弱。所以长时间处于噪音环境中的人很容易发生眼疲劳、眼痛、眼花和视物流泪等眼损伤现象。同时，噪音还会使色觉、视野发生异常。调查发现噪音对红、蓝、白三色视野缩小80%。

Noise from home appliances can damage hearing

5. Strong noise can cause ear discomfort, such as tinnitus, earache, and hearing loss

It is determined that noise exceeding 115 decibels can also cause deafness.According to clinical medical statistics, if living in a noise environment above 80 decibels, it can cause up to 50% of the deaf.Medical experts believe that household noise is one of the causes of deafness and dumbness in children.

To reduce or avoid household noise hazards, first try not to put noisy electrical appliances in the same room.For example, the washing machine should be placed in the patio or bathroom as much as possible.Do not put the refrigerator in the bedroom. The wall should not be too smooth. You can hang some picture frames on the wall to beautify the room and reduce indoor echo.In addition, it is best to put a few potted flowers indoors, not only to adjust the microclimate, but also to reduce the noise.

Don’t turn on the volume too high when watching TV or listening to the radio, only the right volume can feel the melodious music.If you stay in an environment above 100 decibels for several hours, it will cause irreversible damage to your hearing.

对于多件家用电器噪音的计算不能用简单的加法，正确的计算方法是在有两个以上不同的噪音源时，由最强的噪音源逐次计算其总噪声级：当两个声级之间相差0~1分贝时，应增加较高声级的数值3分贝；相差2~3分贝时，增加2分贝；相差4~8分贝，增加1分贝。相差8分贝以上时，则可忽略不计低的噪音源，只算高噪音源的分贝值即可。

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