reproducing head; playback head
Technical term in computing and engineering for the component that reads signals from magnetic media such as tapes or disks.
このテープレコーダーの再生ヘッドが汚れている。
The playback head of this tape recorder is dirty.
Compound of 再生 (playback, reproduction) and ヘッド (head), a direct calque of English 'reproducing head' or 'playback head'.