Technical Program

ADVANCED AIR MOBILITY NOISE
Noise prediction, measurement, and control for advanced air mobility vehicles, including eVTOLs and hybrid-electric concepts. Topics include distributed electric propulsion systems, rotor–rotor and rotor–wing interactions, airframe–propulsion integration, community noise impacts, interior noise, and noise abatement strategies.

UNMANNED AIR SYSTEMS AEROACOUSTICS
Aeroacoustics of unmanned aircraft systems across a range of sizes and configurations, including multirotors, fixed-wing, and hybrid designs. Topics of interest are rotor/propeller noise mechanisms, broadband and tonal sources, payload and structural integration effects, flight-path noise, urban/complex acoustic environments, and noise reduction technologies.

ADVANCED TESTING TECHNIQUES
Development and application of novel testing techniques, advanced diagnostic methods and test facilities. Topics of particular interest are detailed measurements of mean and turbulent flow phenomena that contribute to noise generation and/or affect the radiated sound; source localization including phased arrays; properties of sound-absorbing materials; interior-noise test facilities and comparison of model and full-scale testing.

JET AEROACOUSTICS
Aerodynamics and aeroacoustics of jets focusing on identifying and modeling noise production mechanisms; near-field noise; shock noise; turbulence prediction and characterization for subsonic and supersonic, circular, noncircular, and multi-stream jets including those associated with launch vehicles; and suppression methods for both subsonic and supersonic jet noise.

PROPELLER, ROTORCRAFT, AND WIND TURBINE NOISE
Conventional and advanced single and counter- rotating propellers; tonal and broadband noise; propagation and ground reflection effects; fuselage boundary layer refraction and scattering; noise source control; effects of inflow distortions; and installation effects. Rotorcraft source studies, including rotor harmonic noise, high-speed impulsive and blade/vortex interaction noise, blade/turbulence interaction noise, and jet/surface interaction noise, including both ground and aircraft surfaces. Component and system noise prediction and validation, ground and flight test measurements, and noise control/ reduction strategies. Gearbox noise.

AIRFRAME / HIGH-LIFT NOISE
Noise source mechanisms of flow/surface interaction as related to airframe acoustics. Measurement, analysis, and prediction methods for wing, flap, slat, and landing gear noise. Noise reduction strategies, including devices and methods of circulation and boundary layer control.

REDUCED-ORDER MODELING AND MACHINE LEARNING FOR FLUID DYNAMICS AND AEROACOUSTICS
Development and application of reduced-order models and machine learning techniques for aeroacoustic prediction, analysis, and control. Topics include data-driven modeling of complex flows and noise sources, surrogate modeling for design and optimization, real- time noise prediction, uncertainty quantification, and hybrid physics–machine learning approaches.

ACOUSTICS / FLUID DYNAMICS INTERACTIONS
Analysis, measurements, and control of subsonic and supersonic flows, boundary layer flows, flow acoustic interactions and resonance, acoustic scattering, and acoustic shielding. Active Control of noise, vibration, and flows; development of associated sensors and actuators; and feedback and feed-forward control strategies.

INTERIOR NOISE / STRUCTURAL ACOUSTICS AND METAMATERIALS
Reduction of interior noise and vibration associated with aircraft, launch vehicles, automobiles, and trains. Noise transmission through structures, vibroacoustic testing, and prediction methods. Acoustic metamaterials and mechanical metamaterials targeting noise reduction.

FLIGHT VEHICLE COMMUNITY NOISE, SONIC BOOM, AND METRICS
Response of individuals and the community to aircraft noise. Virtual acoustic simulations. Noise assessment methodologies and metrics. Whole aircraft noise prediction, in-flight noise (including sonic boom). Airport noise prediction, including tools for land-use planning with respect to aircraft noise and noise monitoring methods. Noise abatement procedures.

COMPUTATIONAL AEROACOUSTICS
Development of numerical techniques for aeroacoustics applications, including integral methods, adjoint and scattering methods, turbulence-resolving methods such as Large Eddy Simulation (LES) or Lattice Boltzmann Method (LBM), high order schemes and enabling methods such as boundary conditions and simulated turbulence generation. Applications of computational aeroacoustics in academic and industrial research.

TURBOMACHINERY AND CORE NOISE
Generation, propagation, and control of noise from fans, compressors, and turbines; combustion noise; propagation and interaction with the mean flow field; transmission and reflection from blade and vane rows; control using active or passive techniques; and measurement techniques for source identification.

DUCT ACOUSTICS
New and innovative methods to analyze, predict, and control the turbomachinery noise propagating through nacelle ducts. In-duct beamforming and source separation. Passive and active/adaptive acoustic liners.

GENERAL ACOUSTICS
Theoretical, numerical, and experimental research involving all areas of physical acoustics and those involving noise associated to commercial systems.

UAS / UAM ACOUSTIC MEASUREMENTS AND CERTIFICATION
Measurement and certification methodologies for noise generated by unmanned aircraft systems (UAS) and urban/advanced air mobility (UAM/AAM) vehicles. Topics of interest include standardized flight procedures, test facilities, community-based measurements, microphone array techniques, metrics development, and regulatory frameworks for certification of novel vehicle classes.