Multirotor hover noise calculator

Height above observer5 m 1 m120 m

Inputs

Aircraft

Database fills the six model inputs from a reviewed aircraft record.

Model input

AANTC Hover Geometry Model 2.0.0

AANTC Hover Geometry Model 2.0.0 uses six aircraft geometry and weight inputs plus observer height.

Euronoise 2025 compatibility model 1.0.0 uses maximum take-off mass and disk area ratio, with receiver distance as an optional input. It is a separate API model and is not used by this form.

Aircraft

Arm count Arm radius cm Propeller radius cm Weight kg Arm length cm Body length cm

Observer

Directly below

Aircraft azimuth Fixed by model0° Horizontal distance0 m Directly below0 m Observer height1.6 m Default person height · 1.6 m5 m

Environment

Ground surface Weather

Observer output

AANTC Hover Geometry Model · 2.0.0

Current condition

Hover · directly below

Model 2.0.0

L_max — dB

Unavailable without a sound-pressure time history

L_eq,T — dB

Unweighted equivalent level at the selected height

Δt — s

Measurement window inherited from the source data

L_E — dB

Unweighted sound exposure level over the measurement window

Observer geometry

Source distance: 5.0 m
Reference OASPL at 5 m: — dB
Distance correction: — dB
Elevation angle: 90.0°
Horizontal distance: 0 m
Observer position: Directly below
Observer height: 1.6 m
Ground and weather: Not modelled