also: おんこう
tone hole
Technical term in music; an opening on a wind instrument that is covered or uncovered to change pitch.
See also: トーンホール
Covering the tone holes on a flute with your fingers changes the pitch.
This instrument has six tone holes.
Standard kanji form; the reading おんこう is the most common for this compound.
Alternate reading; less common and may be considered non-standard in technical contexts.
Compound of 音 (sound) and 孔 (hole). The reading おんこう follows the on'yomi pattern, while おとあな is a mixed reading.