These breaks can be produced by lips, a tongue, a throat and muscles closing nasal cavity. This second type of interrupter is rarely used in fast speech - this dynamic interrupter needs a relatively long period to be executed. Some remnant of it in fast speech is denoted in writing with double consonant. However, it was widely used in ancient Hebrew. This kind of interrupt requires a vowel before and after it.
Slow speech allows deployment of a throat.
In fast speech, sometimes we find deployment of a glottal stop. Ancient Hebrew deployed all four tools. The movement of muscles of throat is slow, and these tools of language are lost, when speech speeds up. The other specific type of an interrupt is produced by very back of a tongue. It is slow and cannot be used in fast speech, but it was used in ancient Hebrew - kof .