These are interdental with the tip of the tongue visible between the teeth, as in th in American English ; interdental with the tip of the tongue down behind the lower teeth, so that the blade is visible between the teeth ; and denti-alveolar, that is, with both the tip and the blade making contact with the back of the upper teeth and alveolar ridge, as in French t, d, n, l. The first tends to be used in careful enunciation, and the last in more rapid speech, while the tongue-down articulation is less common.

These are interdental with the tip of the tongue visible between the teeth, as in th in American English ; interdental with the tip of the tongue down behind the lower teeth, so that the blade is visible between the teeth ; and denti-alveolar, that is, with both the tip and the blade making contact with the back of the upper teeth and alveolar ridge, as in French t, d, n, l.

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