Invisible sound: Noisy or deafening sound is sound. Buildings near machine factories, railways and subway stations or buildings where piling works are being carried out near their homes are usually very noisy. If it appears in Kunming (southwest), it is particularly fierce.
Influence: the host is restless and unable to concentrate. This will affect his health for a long time.
The method of resolving sound evil is an evil that is not easy to resolve. First of all, placing crystals is good for health; At the same time, the source of sound should be eliminated: try to choose sound insulation materials when decorating, or choose thicker glass with better sound insulation effect. When the situation is serious, double glass can be used.