Crate autoeq_roomsim 

WASM bindings for Room Acoustics Simulator

This module provides WebAssembly bindings to run room acoustics simulations in the browser. It supports:

• Rectangular and L-shaped room geometries
• Multiple sources with directivity and crossover filters
• Multiple solver methods:
  • Direct field computation (free-field propagation)
  • Image Source Method (ISM) with 1st, 2nd, 3rd order reflections
  • Modal analysis for low frequencies
  • Hybrid modal/ISM with Schroeder frequency crossover
  • BEM (Boundary Element Method) for accurate wave-based simulation
• Frequency response and spatial slice visualization
• Impulse response generation
• Binaural rendering

The BEM solver uses pure Rust linear algebra (no BLAS) for WASM compatibility.

Structs

BemConfig

Complete BEM solver configuration

BemResult

Result of a BEM simulation at a single frequency

BinauralConfig

Configuration for binaural rendering

BinauralResponse

Binaural output containing left and right ear responses

BoxObject

Configuration for a box-shaped scattering object

CylinderObject

Configuration for a cylinder-shaped scattering object

DiffractionEdge

Represents an edge in the room for diffraction calculation

DirectivityPattern

Directivity pattern

FmmConfig

FMM configuration

FrequencyConfig

Frequency range configuration

ImpulseResponse

Impulse response data structure

ImpulseResponseConfig

Configuration for impulse response generation

LShapedRoom

L-shaped room

MetadataConfig

Simulation metadata

Point3D

3D point in space

Point3DConfig

3D point configuration

RectangularRoom

Rectangular room

RoomAcoustics

Room acoustics metrics including RT60

RoomMode

Represents a room resonant mode

RoomOutput

RoomSimulatorWasm

Room Acoustics Simulator - WASM interface

SimulationConfig

Complete simulation configuration

SimulationResults

SliceOutput

SolverConfig

Solver configuration

Source

Sound source

SourceConfig

Source configuration

SourceOutputInfo

SourceResponse

SphereObject

Configuration for a sphere-shaped scattering object

SpinoramaCurve

A single SPL curve at a specific angle (for spinorama directivity data)

VisualizationConfig

Visualization configuration

WallMaterial

Wall material with frequency-dependent absorption coefficients

WallMaterialsConfig

Wall materials configuration for all 6 surfaces

Enums

BemAssemblyMethod

Assembly method for the BEM matrix

BemSolverMethod

Linear solver method

CrossoverConfig

Crossover filter configuration

CrossoverFilter

Crossover filter

DirectivityConfig

Directivity pattern configuration

RoomGeometry

Room geometry enum

RoomGeometryConfig

Room geometry configuration

ScatteringObjectConfig

Scattering object enum for JSON configuration

WallMaterialConfig

Wall material configuration (JSON-serializable)

WallSurface

Wall surfaces in a rectangular room

Constants

ABSORPTION_FREQUENCIES

Standard octave band center frequencies for absorption coefficients (Hz)

Functions

approximate_hrtf_magnitude

Simplified HRTF magnitude approximation

calculate_air_absorption

Calculate air absorption coefficient (Np/m) using ISO 9613-1 approximation

calculate_binaural_response

Calculate binaural response for a room simulation

calculate_ear_positions

Calculate ear positions from head center and orientation

calculate_impulse_response

Calculate impulse response from frequency response using IFFT

calculate_itd

Calculate interaural time difference (ITD) using Woodworth’s formula

calculate_modal_pressure

Calculate modal pressure at a point from room mode superposition

calculate_room_acoustics

Calculate room acoustics for a rectangular room with given wall materials

calculate_room_modes

Calculate room modes for a rectangular room

compute_impulse_response

Compute impulse response from frequency response data

create_default_config

Create a default configuration JSON

critical_distance

Calculate critical distance (where direct and reverberant fields are equal)

edge_diffraction_coefficient

Calculate edge diffraction coefficient using simplified UTD (Uniform Theory of Diffraction)

get_material_presets

Get a list of available wall material presets

get_rectangular_room_edges

Get diffraction edges for a rectangular room (12 edges at corners)

get_room_modes

Calculate room modes for a rectangular room (standalone WASM function)

get_rt60

Calculate RT60 and other room acoustics metrics

get_schroeder_frequency

Get the Schroeder frequency for a room

hybrid_crossover_weight

Calculate hybrid crossover weight for blending modal and ISM responses

init_panic_hook

Initialize panic hook for better error messages in browser console

rt60_eyring

Calculate RT60 using Eyring’s formula

rt60_sabine

Calculate RT60 using Sabine’s formula

validate_config

Validate a configuration JSON and return any errors