Arabic letters' phonetics can be divided, from the point of view of nasal airflow, into nasal and non-nasar phonemes. Practical measurements have been carried out to define some nasal and non-nasal words. Two sets of words (nasal and non-nasal) have been selected. A pecial software package to achieve the required measurement is written in Turbo Pascal. In this software, the end-point detection is used to recognize the silence from the sound. This is used to enhance the calculation of airflow during each word. Measurements have been performed over 50 nonnal subjects. The results have been processed to define the range of airflow in each word. These ranges are proposed to be the standardization of the method to he used later with the abnormalities. The system used in the measurement is the nasal anemometer. This system is an achievement of a research project financed by the Egyptian Army. The anemometer and the software is an objective (human independent) tool for the diagnosis of nasal airways.