Sensitivity Auditory

Auditory sensitivity (Latin s. auditivus - audire - listen). One of the most important physiological signs of the state of the auditory system is its sensitivity. A newly born baby cannot hear. He does not yet have an organ of hearing and an identifying nervous apparatus for auditory analysis of sound. For newborns, the intensity of the sound signal is measured in decibels of sound intensity and is outside the range of values ​​​​perceived by humans. The loudness only appears after about a week has passed. The auditory perception of sounds begins to become active only as the internal ear labyrinth and its neural circuit improve, which is in development from the earliest period of childhood to the onset of puberty, and in boys one year later than in girls. As a result, these children can discriminate tones at lower volume levels than adults.

The main thing is that the development of auditory function occurs unevenly. It continues to develop until the age of 20-25. In this regard, the indicators of absolute and relative sensitization are also different. Thus, maximum relative sensitization is achieved by the age of two and then decreases. By the age of 7, it becomes approximately the same as it was in an adult. Absolute sensitivity at this age does not reach the maximum values ​​corresponding to adult values, and the tendency to perceive lower sound intensities remains. Children's relative sensitivity develops most poorly to rapidly changing sounds. First of all, this applies to regions with a complex spectrum of sounds. It is a mistaken belief that sensitized individuals hear speech better. This is greatly exaggerated. Along this line the differences are at least the same as