Objective: To establish normative speech ABR parameters: the latency and amplitude of the onset ABR waves to speech stimuli in normal population across different age groups and to compare it with click-ABR to explore their underlying relationships. Methods: The speech-ABR and click-ABR were recorded from 45 healthy subjects without any hearing problem examined by audiometric examination. A rarefaction click and speech syllable/da/ were used. The onset response was analyzed for absolute, interpeak and interaural latencies, amplitudes of wave V click ABR and wave V speech ABR as well as V-A duration. Results: The main components of speech-ABR were clearly identified, and were categorized according to onset response, it was found that females having significantly faster and larger magnitude responses to the transient aspects of the stimulus compared to males. By analysis our results across different age groups, it was clear that delayed neural timing in the brainstem response to the onset of a speech syllable in older adults compared with younger adults. Conclusions: This study established the normative patterns of speech-ABR onset response in different age groups. Their main components are closely related and analogous to the main waves of click-ABR. This throws light on the processing of speech in brainstem with applications in research as well as in clinical purposes. Such understanding is especially important if one is interested in studying the central auditory system function.