Forced Alignment

Forced alignment is an automatic speech processing technique that aligns a speech recording with its known transcription at the phoneme or word level. Unlike free speech recognition which determines the most likely sequence of sounds, forced alignment constrains the recognizer to match the expected pronunciation and determines precise timing boundaries for each unit. In accessibility applications, forced alignment enables detailed analysis of pronunciation accuracy, speech timing abnormalities, and articulation patterns in disordered speech, supporting both clinical assessment and personalized speech recognition adaptation.