UN ຮຽກຮ້ອງໃຫ້ຜລິດ ອຸບປະກອນການຟັງສຽງສາມາດຄວບຄຸມ ຣະດັບສຽງເອງໄດ້
People check out the new ear buds after an event to announce new products, Wednesday, Sept. 7, 2016, in San Francisco. (AP Photo/Marcio Jose Sanchez) Source: AAP
In the year 2010, 360 million people around the world had hearing loss. At present, the number increased to over 460 million people. This is due to listening devices.
Share
