吐音是一种利用舌头在木管乐器上控制吹气气流，表现出各种声音效果的技术。概分有4种方法：单吐、双吐、三吐和弹吐法。

单吐（Single Tonguing）是吐音最基本的运舌法，每个声音的起始皆以这个方法发声。一般使用单吐时的发音都是「tu tu tu」。速度不宜超过拍速一分钟128拍的连续十六分音符。

Tonguing is a technique used with wind instruments to enunciate different notes using the tongue on the reed or woodwind mouthpiece or brass mouthpiece. A silent "tee" is made when the tongue strikes the reed or roof of the mouth causing a slight breach in the air flow through the instrument. If a more soft tone is desired, the syllable "da" (as in double) is preferred. The technique also works for whistling. Tonguing (or articulation) refers to how a musician begins the note (punchy, legato, or a breath attack) and how the note is released (air release, tongued release, etc.) For wind players, articulation is commonly talked about in terms of tonguing because the tongue is used to stop and allow air to flow in the mouth. Tonguing does not apply to non wind instruments, but articulation does apply to all instruments.