Plosive consonants begin with silence then a burst when the tract opens.

Evidence

Plosives /p, b, t, d, k, g/: The vocal tract and nasal tract are completely closed causing a short silence /p, t, k/, or almost completely closed causing a faint voiced sound /b, d, g/. When the tract is opened, a short impulsive sound, or burst, is generated. The impulsive sound can be either noise-like or an exponentially decaying harmonic tone complex. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 582

Categorization

• DEFINE: Shows how brief silences function as speech building blocks, relevant to the reader’s silence-and-sound interests.