Pahawh has twenty onset letters to transcribe sixty phonemic onsets. Initials (or syllable onsets) are initial consonants of possible syllables. In the onsets of low-tone syllables, consonants are voiced. It does not allow complex onsets or codas. The glides , , and appear in syllable onsets immediately followed by a full vowel. Some sequences of glide + vowel can be found after obstruent-liquid onsets, however. Mental chronometry uses measurements of elapsed time between sensory stimulus onsets and subsequent behavioral responses. The bilabial stops in complex onsets are often omitted in colloquial speech. The cluster , however, infringes the constraint for three-consonantal onsets in English. This was disrupted by his sudden onsets of depression occurring approximately every 10 days. Most onsets at this age will not be, or become, comorbid. This type of cluster only occurs in onsets. After three desperate onsets, the besiegers retired behind the ditch. This entails tracking pitch and identifying note onsets. Mid-level audio features refer to pitch, onsets, and beats.