Simulator Library
Acoustics Simulators
Acoustics simulators for sound level, noise, room acoustics, resonance, absorption, and ultrasound.
40 simulators
Adjacent categories
Simulator list
Acoustic Beats Simulator — Two-Tone Interference and Beat Frequency
Add two sine tones whose frequencies f1 and f2 differ slightly and a slow loudness pulsation appears at |f1 - f2| Hz, the classic beat phenomenon.
Acoustic Impedance Tube Simulator
Visualize standing wave patterns in a tube. Adjust frequency, tube length, and boundary conditions to explore resonance frequencies and pressure distributions in real ti…
Acoustic Impedance Reflection & Transmission Calculator
Calculate acoustic impedance, reflection/transmission coefficients, and loss instantly. Visualize wave behavior with animated diagrams for any two-medium interface.
Acoustic Resonance & Wind Instrument Simulator — Standing Waves in Pipes
Explore standing wave resonance in open pipes, closed pipes, and Helmholtz resonators. Adjust pipe length, temperature, and harmonic number to see how flutes, clarinets,…
Acoustic Standing Wave Simulator (Tube & Room Modes)
Visualize acoustic standing waves in tubes. Interactive simulator shows mode shapes, natural frequencies, and formulas for open, closed, and half-open resonators.
Room Acoustics Reverberation Time Calculator — Sabine & Eyring RT60
Calculate RT60 reverberation time for any room. Input dimensions, materials, and target frequency to compare Sabine & Eyring formulas across 6 octave bands.
Active Noise Control FXLMS Simulator
Link cancellation waveform, convergence history, and residual spectrum to see how step size trades speed for stability.
Anechoic Chamber Low-Frequency Cutoff Simulator
A design calculator for anechoic chambers: enter the chamber dimensions, wedge length, absorber density and target cutoff to see the wedge cutoff frequency, usable free-…
Doppler Effect Simulator — Observed Frequency & Wavefront Animation
Adjust source velocity, observer velocity, and speed of sound to calculate observed frequency in real time. Three tabs — circular wavefront animation, frequency-velocity…
Drone Quadcopter Noise Prediction Simulator
Predict the noise radiated by multirotor UAVs — consumer quadcopters, industrial inspection drones, delivery UAS and eVTOLs — from blade passage frequency (BPF) and a sp…
HVAC Duct Silencer Attenuation Simulator
A tool that predicts the insertion loss of a lined HVAC duct silencer using the Sabine empirical formula.
Echo Delay & Distance Calculator
Set delay time and temperature to calculate reflection distance
Helmholtz Resonator Simulator — Acoustic Resonance
Helmholtz resonator simulator: real-time resonant frequency, effective neck length, wavelength and period from cavity volume, neck diameter, neck length and sound speed.
Loudspeaker Thiele-Small Parameters Simulator
Compute the Thiele-Small parameters — the "blueprint" of a moving-coil loudspeaker driver.
Microphone Array Beamforming (Delay-and-Sum) Simulator
Design a uniform linear microphone array that emphasises sound from one direction by aligning and summing the channels (delay-and-sum beamforming).
Muffler Transmission Loss Simulator
Design an expansion-chamber muffler that quietens sound not by absorbing it but by reflecting it back. Adjust the chamber-to-pipe area ratio, the chamber length and the …
Music Chord Harmonics Visualizer
Select root note and chord type to visualize frequency spectrum, composite waveform, and harmonic structure in real time. Understand the physical difference between cons…
Noise Propagation & Distance Attenuation Calculator
Calculate sound pressure level (SPL) vs. distance for point & line sources using ISO 9613-2, including atmospheric absorption, barrier loss, and ground effects.
Noise Barrier Insertion Loss Calculator — Maekawa Diffraction
Calculate noise barrier insertion loss in real time using the Maekawa diffraction formula. Visualize geometry and view the full frequency spectrum.
Room Noise Criterion (NC) Curve Simulator
Enter octave-band SPL values measured in a room and the tool compares them to Beranek's NC family, returning the NC rating, governing frequency and A-weighted level. Pra…
Noise Level Calculator — SPL Combination, Distance Attenuation & A-Weighting
Calculate combined noise from up to 5 sources with distance, atmospheric, and A-weighting corrections for point or line sources.
Noise Mapping · ISO 9613-2 Compliant
ISO 9613-2 compliant noise mapping software. Model point sources, barriers, and ground effects to generate real-time 2D noise contour maps and Lden calculations.
Room RT60 Sabine/Eyring Acoustic Design Simulator
Compute reverberation time RT60 with both Sabine and Eyring equations from room dimensions, wall/ceiling/floor absorption, occupants, and absorber panel area. Compare ag…
Noise & Vibration dB Calculator — SPL, Distance Attenuation, A-Weighting
Calculate noise levels with our real-time dB tool for SPL, distance, A-weighting, and source combination. Compare decay curves and source dominance.
Octave Band Noise Spectrum Analyzer
Input SPL for 9 octave bands and instantly compute A/C/Z-weighted levels, overall SPL, Zwicker loudness, and NC curve compliance in real time.
Room Reverberation Time Simulator
Compute the reverberation time T60 — how long sound lingers in a room after the source stops — with the Sabine and Eyring equations. Adjust the room volume, surface area…
Sound Absorption & Reverberation Time Calculator (Sabine)
Calculate RT60 reverberation time instantly. Input room dimensions and materials for acoustic analysis of halls, studios, and more using Sabine & Eyring formulas.
Sound Level & Decibel Scale Calculator
Set a reference sound level, source distance and number of sources to compute SPL, distance attenuation and combined level. Compare with everyday reference sounds.
Sound Pressure Level & Noise Calculator (dB Combination)
Calculate combined sound pressure levels, distance attenuation, and A-weighting corrections for noise analysis. Compare results with WHO/ISO standards.
Sound Power Level (ISO 3744) Simulator
Compute the radiated sound power level L_W of a machine using the ISO 3744 free-field engineering method.
Sound Pressure Level vs Distance Simulator
Calculate how much quieter a point sound source becomes as you move away from it.
Sound Transmission Class (STC) Simulator
Estimate the wall-isolation performance of partitions, party walls and studio shells using the US Sound Transmission Class (STC) rating.
Sound Wave Simulator (Web Audio API) — See & Hear Frequency, Waveform & Beats
Visualize sound waves in real time. Adjust frequency, waveform, and amplitude. See particle oscillation animations and hear the resulting sound simultaneously.
STI Speech Intelligibility Simulator
The Speech Transmission Index (STI) is the international standard score that quantifies how reverberation and background noise damage speech intelligibility, via the mod…
Speed of Sound Simulator — Wave Propagation in an Ideal Gas
Compute the speed of sound c, target speed at Mach M, Mach cone half-angle and 1 km travel time in real time from heat capacity ratio gamma, molar mass M, temperature T,…
String Resonance & Standing Wave Simulator — Harmonics, Mode Shapes & Acoustics
Visualize string eigenmodes in real time. Compute fundamental frequency and harmonics from tension, density, and length with this wave simulator.
Subwoofer Bass-Reflex Port Tuning — Helmholtz Fb
From enclosure volume, port diameter and port length, compute the Helmholtz tuning frequency Fb of a bass-reflex enclosure in real time, and evaluate the match against Q…
Double-Wall Sound Transmission Loss (TL) Simulator
Calculate the sound transmission loss of a "two panels + air gap" construction — double-glazed windows, studio partitions, speaker enclosures.
Ultrasound Attenuation Simulator
See how much energy a medical ultrasound pulse loses to absorption and scattering as it travels through tissue.
Underwater Acoustic Sonar Equation Range Simulator
A real-time calculator for the active and passive sonar equations (Urick 1983).
How to Use
- Select your acoustic scenario: open field, enclosed room, or duct propagation from the scenario dropdown.
- Input source parameters—sound power level (dB re 1W), frequency band (63 Hz to 8 kHz octave bands), and directivity index if applicable.
- Define receiver location via distance (meters) and room absorption coefficients (α values 0.0–1.0) for each surface material at the selected frequency.
- Set filter type (A-weighting, C-weighting, or unweighted linear) and run simulation to compute sound pressure level (dB re 20 µPa) at receiver.
Worked Example
Industrial centrifugal pump (sound power 95 dB re 1W) installed 3 m from operator in a concrete plant room. Room dimensions 8 m × 6 m × 4 m height; concrete walls α=0.03 at 1 kHz, steel floor α=0.05. With A-weighting filter applied, uncontrolled SPL at operator position yields 82 dB(A). Adding 50 mm melamine foam (α=0.85 at 1 kHz) to two walls reduces result to 74 dB(A), meeting 80 dB(A) occupational threshold. Resonance peak observed at 125 Hz (room mode: length fundamental = 1000/8 = 125 Hz) shows 6 dB amplification before damping treatment.
Practical Notes
- Validate absorption coefficients against manufacturer datasheets; untreated concrete varies 0.02–0.08 across frequency, significantly affecting mid-frequency predictions.
- Account for directivity: omnidirectional sources use DI=0 dB; directional machinery (axial fans, compressors) show DI up to +15 dB along primary axis.
- For noise control predictions, prioritize frequencies where source dominates and room absorption is lowest; treating 1–2 kHz octaves often yields best cost-to-benefit ratio in HVAC applications.