ACOUSTIC SAFETY ASSESSMENT METHOD Russian patent published in 2019 - IPC A61B5/12 

FIELD: measurement technology.

SUBSTANCE: invention refers to methods of assessing human life safety, namely to methods for assessing acoustic safety of human vital activity. Method of acoustic safety assessment consists in the fact that according to the acoustic environment parameters measurement results the Δ₁ is difference between actual and maximum allowable value of equivalent sound level A per working shift, Δ₂ is difference between actual and maximum permissible value of maximum level of sound A, measured with time correction "slowly" equal to 1 s, Δ₃ – difference between actual and maximum allowable value of maximum level of sound A, measured with time correction "pulse", equal to 40 ms, Δ₄ is difference between actual and maximum allowable value of peak sound level corrected on scale "C", Δ₅ is difference between actual and maximum allowable value of equivalent total infrasound level per working shift, Δ₆ is the difference between the actual and the maximum permissible value of the maximum total infrasound level, measured with time correction "slowly" in frequency range 1.4…22 Hz, Δ₇ is difference between actual and maximum allowable value of equivalent level of sound pressure per working shift in octave frequency band 2 Hz, Δ₈ – difference between actual and maximum allowable value of equivalent level of sound pressure per working shift in octave frequency band 4 Hz, Δ₉ is difference between actual and maximum allowable value of equivalent level of sound pressure per working shift in octave frequency band of 8 Hz, Δ₁₀ is the difference between the actual and maximum allowable value of the equivalent sound pressure level per working shift in the octave frequency band of 16 Hz, Δ₁₁ is the difference between the actual and maximum allowable sound pressure level in the octave frequency band of 31.5 Hz, Δ₁₂ is the difference between the actual and maximum allowable sound pressure level in the octave frequency band of 63 Hz, Δ₁₃ is difference between actual and maximum allowable value of sound pressure level in octave frequency band of 125 Hz, Δ₁₄ is difference between actual and maximum allowable value of sound pressure level in octave frequency band of 250 Hz, Δ₁₅ is difference between actual and maximum allowable value of sound pressure level in octave frequency band of 500 Hz, Δ₁₆ is difference between actual and maximum allowable value of sound pressure level in octave frequency band of 1,000 Hz, Δ₁₇ is difference between actual and maximum allowable value of sound pressure level in octave frequency band of 2,000 Hz, Δ₁₈ is difference between actual and maximum allowable value of sound pressure level in octave frequency band 4,000 Hz, Δ₁₉ is the difference between the actual and maximum allowable sound pressure level in the octave frequency band of 8,000 Hz, based on which values the acoustic safety factor is calculated, and by value of k evaluating human acoustic safety as: unsatisfactory if k<5; satisfactory if 5≤k<15; good if 15≤k 25 or excellent if k≥25.

EFFECT: use of the invention makes it possible to provide the possibility of assessing the acoustic safety of human vital activity on the basis of determining objective estimates of informative indicators.

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