Acoustic Physics & Lab Calculators
Speed of sound, Doppler effect, resonance frequency, room modes, standing waves, RT60, Helmholtz resonator, natural frequency, wave interference, acoustic impedance, and more — calculators and simulators for physics students, acoustic engineers, and audio professionals.
Available Tools
Speed of Sound Calculator
Calculate speed of sound in air, water, steel, and 12+ media with temperature correction, wavelength output, and unit conversion.
Launch tool →Wavelength Calculator
Convert between frequency and wavelength for sound, light, and radio waves. Bidirectional with medium and temperature adjustment.
Launch tool →Room Mode Calculator
Calculate axial, tangential, and oblique room resonance modes. Visualize modal distribution up to 300 Hz with Schroeder frequency.
Launch tool →Doppler Effect Calculator
Calculate observed frequency shift for moving sources and observers with formula display, cents shift, and animated visualization.
Launch tool →Mach Number Calculator
Convert speed to Mach number at any temperature. Shock cone angle calculation and flight regime classification (subsonic to hypersonic).
Launch tool →RT60 Reverberation Calculator
Calculate reverberation time using Sabine and Eyring formulas. Add room surfaces with absorption coefficients per frequency band.
Launch tool →Inverse Square Law Calculator
Calculate how sound pressure level changes with distance using SPL₂ = SPL₁ − 20·log₁₀(d₂/d₁).
Launch tool →Beat Frequency Calculator
Calculate beat frequency |f₁ − f₂| from two tones with animated waveform visualization, audio playback, and musical note display.
Launch tool →dB Addition Calculator
Correctly add multiple decibel sources using logarithmic addition. Shows total combined SPL with individual contribution percentages.
Launch tool →Standing Wave Calculator
Calculate resonance frequencies for open/closed tubes and strings with canvas visualization of nodes, antinodes, and harmonic modes.
Launch tool →Harmonic Series Calculator
Calculate all overtones for any fundamental frequency with musical note names, cents deviation from equal temperament, and harmonic spectrum.
Launch tool →Acoustic Impedance Calculator
Calculate Z = ρc for any medium. Reflection and transmission coefficients at material boundaries with impedance mismatch analysis.
Launch tool →Acoustic Resonance Frequency Calculator
Calculate resonant frequencies of tubes, cavities, and enclosures with open/closed end conditions, medium selection, and visual mode shape diagrams.
Launch tool →Mechanical Resonance Frequency Tool
Calculate resonance for spring-mass systems, cantilever beams, and simply-supported beams with damping ratio input and amplitude-vs-frequency plots.
Launch tool →Natural Frequency Calculator
Calculate f = (1/2π)√(k/m) for spring-mass, pendulum, and beam systems. Visual oscillation animation at the calculated frequency.
Launch tool →Wave Interference Simulator
Visualize constructive and destructive interference of two waves with adjustable frequency, amplitude, and phase. Includes 2D ripple tank mode.
Launch tool →Sound Energy Calculator
Convert between SPL and sound power in watts. Distance-aware calculation with ISO 3744 reference and comparison table from whisper to jet engine.
Launch tool →Sound Intensity Frequency Tool
Calculate sound intensity (W/m²) at any distance using I = P/(4πr²). A/C frequency weighting with threshold of hearing reference.
Launch tool →Acoustic Panel Placement Calculator
Calculate first reflection points, bass trap positions, and optimal panel placement with a visual room diagram and material recommendations.
Launch tool →Helmholtz Resonator Calculator
Design Helmholtz resonators for targeted bass absorption. Input neck area, length, and cavity volume to calculate resonant frequency and bandwidth.
Launch tool →Pipe Organ Frequency Calculator
Calculate organ pipe frequencies for open and closed pipes with end correction factor. Convert between pipe length and frequency for any rank.
Launch tool →Octave Frequency Calculator
Find frequencies N octaves above or below any input. Includes 1/3 octave band centers, ISO octave band table, and visual frequency ruler.
Launch tool →Frequency Ratio Calculator
Calculate and simplify the ratio between two frequencies, identify the musical interval name, and compare just intonation vs. equal temperament.
Launch tool →Microtone Frequency Calculator
Generate frequency tables for any N-TET tuning system (19, 24, 31-TET and more). Audio preview, export, and 12-TET comparison overlay.
Launch tool →Angular Frequency Calculator
Convert between Hz and rad/s using ω = 2πf. Includes period calculation, rotating phasor diagram, and reference values for common frequencies.
Launch tool →About Acoustic Physics Tools
These calculators cover the core principles of acoustic physics — from fundamental wave mechanics to applied room acoustics and material science. Each tool provides transparent formulas, interactive controls, and educational content explaining the underlying physics.
Whether you're a student studying wave physics, an audio engineer designing a studio, a product developer working on ultrasonic sensors, or a music teacher explaining timbre — these tools are built to give you instant, accurate answers with full formula transparency.
Tool Highlights
- Room Mode Calculator — the most practical tool for studio owners: enter room dimensions and instantly see all resonance modes with a frequency chart, Schroeder frequency, and treatment recommendations.
- RT60 Calculator — enter your room's surfaces and materials to calculate reverberation time. Supports Sabine and Eyring formulas with configurable absorption coefficients per frequency band.
- Speed of Sound Calculator — temperature-corrected speed of sound in 12 media, from air to steel, with wavelength calculation for any frequency.
- Harmonic Series Calculator — find all overtones for any fundamental, with musical note names, cents deviation from equal temperament, and a harmonic spectrum visualization.