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.
Free Waves & Sound Calculators
9 toolsFrequency, wavelength, Doppler effect, and acoustic calculators. Browse our free waves & sound tools below — no sign-up required.
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.