RCAIDE.Library.Methods.Noise.Correlation_Buildup.Airframe.landing_gear_noise

landing_gear_noise

landing_gear_noise(D, H, wheels, M, velocity, phi, theta, distance, frequency)

This calculates the Landing gear 1/3 octave band sound pressure level and overall sound pressure level for a tyre diameter D, a strut length H and WHEELS number of wheels per unit.

Assumptions:

Correlation based.

Source:

Fink, Martin R. “Noise component method for airframe noise.” Journal of aircraft 16.10 (1979): 659-665.

Inputs:

D - Landing gear tyre diameter H - Lading gear strut length wheels - Number of wheels per unit [-] M - Mach number [-] velocity - Aircraft speed phi - Azimuthal angle [rad] theta - Polar angle [rad] distance - Distance from airplane to observer, evaluated at retarded time [ft] frequemcy - Frequency array [Hz]

Outputs: One Third Octave Band SPL [dB]

SPL - Sound Pressure Level of the landing gear [dB] OASPL - Overall Sound Pressure Level of the landing gear [dB]