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The headphone is a installed with positioning spare parts available to know about the changes happening to altitude.
When an airline is taking of,headphones start to be heated with increasing altitude.
The inceasing temperature in earmuffs can counteract the external influence caused by the partial changes of air pressure.
Otherwise,the temperature of earmuffs decreases to prevent earshot from being painful due to the changes happening to air pressure.
Meanwhile , there is a button available to regulate temperature like a warm setting under the winter weather.
Far East University
Tainan City, Taiwan