tuner

tuner
/ˈtju:nə(r); ?@ ˈtu:-; `tunɚ/ n
1 (esp in compounds尤用以构成复合词) person who tunes musical instruments,esp pianos 为乐器调音的人; （尤指）钢琴调音师.
2 part of a radio, TV, etc that selects signals （收音机、 电视机等的）调谐器.

牛津英汉双解词典