There is noise in the speaker sound of the device
On the smartphone product, there are Speakers/Receivers/Microphones holes connected to the outside.
If a strong air pressure is injected into the hole by intentionally from foreign source such as air gun,
specific parts inside of Speakers/Receivers/Microphones may be damaged.
It is recommended not to clean with an air gun but if necessary, in order to remove foreign substances on the holes, please use soft brush which doesn’t make scratch to clean it lightly
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