RCAIDE.Library.Plots.Noise.post_process_noise_data

post_process_noise_data

post_process_noise_data(results, flight_times=array(['06:00:00', '06:30:00', '07:00:00', '07:30:00', '08:00:00', '08:30:00', '09:00:00', '09:30:00', '10:00:00', '10:30:00', '11:00:00', '11:30:00', '12:00:00', '12:30:00', '13:00:00', '13:30:00', '14:00:00', '14:30:00', '15:00:00'], dtype='<U8'), time_period=['06:00:00', '20:00:00'], compute_SENEL=False, compute_SEL=False, compute_eqivalent_noise=False, compute_PNL=False, compute_EPNL=False)

Processes raw noise simulation results into formatted data for visualization.

Parameters:

• results (Results) –

  RCAIDE results data structure containing:

  • segments[i].analyses.noise.settings

    Noise analysis settings including:

    • number_of_microphone_in_stencil

    • microphone_x_resolution

    • microphone_y_resolution

    • topography_file

    • noise_times_steps

  • segments[i].state.conditions

    Flight conditions including:

    • frames.inertial.time

    • noise.hemisphere_SPL_dBA

• flight_times (ndarray of str, optional) – Array of time strings for noise evaluation (default: hourly from 06:00 to 15:00)

• time_period (list of str, optional) – Start and end times for analysis period (default: [‘06:00:00’,’20:00:00’])

• evalaute_noise_metrics (bool, optional) – Flag to compute additional noise metrics (default: True)

Returns:

noise_data –

Processed noise data structure containing:

• SPL_dBAndarray

  Sound pressure levels at each grid point

• timendarray

  Time history array

• aircraft_positionndarray

  Aircraft trajectory points

• microphone_locationsndarray

  Measurement grid coordinates

• topography_filestr, optional

  Path to terrain data if used

• microphone_coordinatesndarray, optional

  Geographic coordinates if terrain used

Return type:

Data

Notes

Processing steps include:

1. Unpacking analysis settings

2. Generating microphone grid

3. Interpolating noise levels

4. Computing metrics

5. Formatting for visualization

Major Assumptions

• Regular measurement grid spacing

• Continuous noise between segments

• Background noise floor exists

• Spherical spreading of sound

Definitions

‘SPL_dBA’

A-weighted Sound Pressure Level

‘Hemisphere’

Directivity pattern around source

‘Stencil’

Local group of evaluation points

See also

RCAIDE.Library.Plots.Noise.plot_noise_level

Visualization of processed data

RCAIDE.Library.Methods.Noise.Common.background_noise

Background noise floor function