eVTOL ACOUSTIC INTELLIGENCE PLATFORM

SONONAI

OPEN ROTOR · CABIN ACOUSTICS · FAR-FIELD MAPPING

Physics-based noise prediction for next-generation eVTOL aircraft. Rotor tonal analysis, cabin treatment design, far-field SPL heatmaps — running entirely in your browser on peer-reviewed aeroacoustics.

⊛ OPEN SONIQ EXPLORE THE SCIENCE ↓

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THE PHYSICS

REAL-TIME ACOUSTIC
FIELD COMPUTATION

SONONAI computes far-field SPL heatmaps, rotor directivity patterns, and cabin noise spectra using the same models as professional noise certification software — Lowson, FW-H, BPM.

FAR-FIELD SPL MAP · eVTOL HOVER

DIRECTIVITY PATTERN · BPF TONAL

CAPABILITIES

EVERY TOOL AN ACOUSTIC
ENGINEER NEEDS

ROTOR NOISE PREDICTION

BPF tonal analysis across all harmonics. Thickness (Lowson 1970), loading (FW-H), broadband (BPM 1989), BVI and ground reflection. A-weighted OASPL at any observer position.

LOWSON · FW-H · BPM

FAR-FIELD SPL MAPPING

HD ground-level noise heatmap with multi-rotor incoherent summation, ground absorption, and A-weighting. Contour rings at 75/65/55/45 dB certification limits.

ISO 9613 · INVERSE SQUARE LAW

CABIN TREATMENT DESIGN

8 acoustic treatment models: JCA, Delany-Bazley, Miki, Biot limp-frame, Helmholtz resonators, MPP panels, CLD damping, glazing. Live SPL reduction plots per treatment.

JCA · HELMHOLTZ · MPP · CLD

AIRCRAFT SELECTION

18 aircraft configurations: Joby S4, Archer Midnight, Lilium Jet, Volocopter 2X, EHang 216, Wisk Cora, DJI M300, Wingcopter 198 and all major UAM layouts.

18 CONFIGURATIONS · REAL + CONCEPTUAL

INDUSTRY BENCHMARKS

SONIQ predictions validated against 12 published eVTOL noise measurements. Full methodology with calibration offsets, physics equations, and literature references.

±1.6 dB MEAN ERROR · 12 AIRCRAFT

ACOUSTIC GLOSSARY

30+ defined terms with formulae and citations. Covers fundamental quantities, rotor parameters, noise models, porous media, resonators, and certification standards.

ISO 717 · IEC 61672 · ICAO ANNEX 16

AIRCRAFT DATABASE

FROM CONCEPT TO
CERTIFIED PLATFORM

Physics-appropriate default parameters loaded automatically for each aircraft — rotor count, diameter, RPM, blade count, chord, and disc loading.

JOBY S4

ARCHER MIDNIGHT

LILIUM JET

VOLOCOPTER 2X

EHANG 216

WISK CORA GEN2

DJI MATRICE 300

WINGCOPTER 198

QUADCOPTER

HEXACOPTER

OCTOCOPTER

COAXIAL ROTOR

TANDEM ROTOR

LIFT + CRUISE

TILT-WING

TILTROTOR V-22

AMAZON MK27-2

DJI PHANTOM 4

MODELS & REFERENCES

FOUNDED ON PEER-REVIEWED
AEROACOUSTICS

Every equation in SONONAI traces directly to a published, peer-reviewed source. No black boxes.

THICKNESS NOISE

Lowson (1970)

J. Acoust. Soc. Am. 47(1B):371–385
Monopole radiation from rotating sources. BPF harmonics via Fourier decomposition of thickness loading.

LOADING NOISE

Ffowcs Williams & Hawkings (1969)

Phil. Trans. R. Soc. A 264:321–342
Dipole radiation from unsteady aerodynamic forces. Dominant at low Mach number in eVTOL hover.

BROADBAND (BPM)

Brooks, Pope & Marcolini (1989)

NASA RP-1218
Trailing-edge, separation, and tip vortex self-noise from NACA 0012 blade-element data. Industry standard.

JCA POROUS MEDIA

Johnson-Champoux-Allard (1987–1991)

J. Fluid Mech. 176 + J. Appl. Phys. 70
5-parameter semi-phenomenological model. Transfer Matrix Method (TMM) on rigid backing.

MICRO-PERFORATED PANEL

Maa, D.Y. (1998)

J. Acoust. Soc. Am. 104(5):2861–2866
Sub-millimetre hole viscous resistance. Aircraft-grade absorber without fibrous fill. Used in cabin liners.

CERTIFICATION

ICAO Annex 16 Vol. I (2017)

Amendment 13 + EASA SC-VTOL-01 (2022) + SAE ARP1779
Community noise limits, measurement procedures, EPNdB calculation methodology.

PRODUCTS

ACOUSTIC ENGINEERING
TOOLS

LIVE

SONIQ

eVTOL ACOUSTIC PREDICTION TOOL

Complete open-rotor noise prediction suite. From aircraft configuration to far-field community noise map — all computations run in your browser with no data upload required.