The new research confirms German studies indicating that about one quarter of military recruits there aged 16 to 24 have already damaged their hearing by listening to loud music and that “almost 10 percent of students aged 16 to 18 had lost so much hearing that they had problems understanding some normal conversation. ”
აირფილტრის სისტემის საშუალებით ხდება ნახშირბადის გამოყოფა და გამონაბოლქვი შიგნით შეწოვილ ჰაერზე უფრო სუფთაა.