Hearing sensitivity of otologically normal persons declines with their age. The pure-tone audiometric threshold of hearing of different age group of people is described. ISO 7029 reveals hearing sensitivity declines as a deviation from the threshold of 18-year-people. The average threshold value agreed well in this studies for young people of 20 years old and old people of 60 years old. In the physchoacoustic experiment the monaural air-condition threshold was measured with a pure-tone audiometer in a sound proof room excluding certain audiological abnormalities. The study confirms that people in recent years have a different auditory profile with better hearing ability at higher frequencies and the it is prominent particularly in case of males.
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