RCAIDE.Library.Methods.Noise.Common.atmospheric_attenuation

atmospheric_attenuation

atmospheric_attenuation(dist, center_frequencies)

This calculates a the atmospheric attenuation of sound for each frequency band as a function of the distance from the source to the observer using Average Atmospheric Attenuation Rates from SAE-AIR-1845

Assumptions:

N/A

Source:

AEDT Technical Manual Table 11-1 (SAE-AIR-1845)

Inputs:

dist - Array with the distance vector from the aircraft (source) to the

microphone position (observer) [m]

center_frequency - center frequencies of one-third octave band [Hz]

Outputs:

delta_spl - The delta sound pressure level to be reduced from the lossless SPL condition [dB]

Properties Used:

None