The Sound Pressure Level Meter

Changes in the human hearing organ cause a specific reaction of the body as a result of intense exposure to sound interference and noise. The increase in the threshold of auditory sensitivity is due to a process of adaptation of the auditory system, which in turn occurs due to prolonged exposure to noise. At first the changes in the auditory system slowly return to their initial level, this is called auditory fatigue; with longer exposure to noise, a permanent shift in the Auditory Sensitivity Threshold occurs, resulting in a rapid deterioration of hearing. In the article, the sound pressure level meter was developed to measure the psofometric noise level, which characterizes the standardized perception of human noise in the audio range from 20 Hz to 20 kHz. The device developed in this work satisfied the requirements of GOST R ISO 9612 - 2016. As a result of the work, recommendations for the use of this device were formed.