Frequency, wavelength, Doppler effect, and acoustic calculators. Browse our free waves & sound tools below — all calculators are instant, accurate, and require no sign-up.
dB Gain Calculator — Calculate decibel gain or loss between input and output power or voltage levels with cascade analysis, Neper conversion, and common dB reference table.
Doppler Effect Calculator — Calculate observed frequency for moving sources and observers with presets for air, water, and steel. Includes Mach number, beat frequency, and speed comparison table.
Harmonic Wave Equation Calculator — Compute displacement, velocity, and acceleration for traveling and standing harmonic waves. Includes wave profile tables, key relationships, and visual displacement indicator.
Mach Number Calculator — Calculate Mach number from velocity and altitude using the International Standard Atmosphere model. Includes flow regime classification, isentropic relations, and altitude comparison table.
Noise Figure Calculator — Calculate noise figure, noise factor, and noise temperature for single stages and cascaded receiver chains using the Friis formula. Includes sensitivity analysis and stage contribution breakdown.
Signal-to-Noise Ratio (SNR) Calculator — Calculate SNR in dB from signal and noise power levels. Includes Shannon capacity, ENOB, Eb/N₀, and application-specific requirement comparisons.
Simple Harmonic Motion Calculator — Calculate displacement, velocity, acceleration, and energy for simple harmonic oscillators. Supports spring-mass, pendulum, and damped systems with motion tables and energy visualization.
Sound Absorption Coefficient Calculator — Calculate sound absorption coefficient from incident and reflected power, or look up values from a 10-material database. Includes Sabine/Eyring reverberation time and RT60 target comparisons.
Wavenumber Calculator — Convert between wavenumber, wavelength, and frequency for electromagnetic and acoustic waves. Includes angular and spectroscopic wavenumber, photon energy, and EM spectrum classification.