ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
18. Noise certification reference procedures-General conditions
Edition: 2026-03-03 · In force
18. Noise certification reference procedures-General conditions
(1)The noise certification reference procedures shall comply with the airworthiness requirements as specified by the Authority.(2)The calculations of reference procedures and flight paths shall be approved by the Authority.(3)Except in conditions specified in regulation 18(4), the take-off and approach reference procedures shall be those defined in regulation 19 and regulation 20, respectively.(4)Where the applicant shows that the design characteristics of the aeroplane would prevent flight being conducted in accordance with regulation 19 and regulation 20, the reference procedures shall—(a)depart from the reference procedures defined in regulation 19 and regulation 20 only to the extent demanded by those design characteristics which make compliance with the procedures impossible; and(b)be approved by the Authority.(5)The reference procedures shall be calculated under the following reference atmospheric conditions—(a)atmospheric pressure at sea level of 1 013.25 hPa, decreasing with altitude at a rate defined by the ICAO Standard Atmosphere;(b)ambient air temperature at sea level of 25°C, decreasing with altitude at a rate defined by the ICAO Standard Atmosphere (i.e. 0.65°C per 100 m);(c)constant relative humidity of 70 per cent;(e)for the purpose of defining the reference take-off profiles for both take-off and lateral noise measurements, the runway gradient is zero; and(f)the reference atmosphere in terms of temperature and relative humidity is considered to be homogeneous (i.e. ambient temperature 25°C and relative humidity 70 per cent) for the purpose of calculating—(i)the reference sound attenuation rate due to atmospheric absorption; and(ii)the reference speed of sound used in the calculation of the reference sound propagation geometry.