By Lee Kyoung Mi and Lee Jihae
Video = Kim Sunjoo and Lee Jun Young
A cell phone rings at a quiet office. But a search for the phone shows that the sound isn't coming from a phone but from a video titled "iPhone sound effect" by the acapella group Maytree.
Posted on the group's official YouTube channel on Feb. 5, the video as of July 7 had 16.17 million views and about 20,000 comments.
The ringtone sounded just like that of a cell phone but came from the human voice. Korea.net on June 30 visited Maytree at the group's studio in Goyang, Gyeonggi-do Province.