recording head
Technical term in audio engineering for the component that writes signals onto magnetic tape or other media.
テープレコーダーの録音ヘッドが汚れていると、音質が悪くなります。
If the recording head of a tape recorder is dirty, the sound quality deteriorates.
Compound of 録音 (recording) and ヘッド (head), a direct calque of English 'recording head'.