Noise Floor Calculator

Calculate thermal noise floor (Johnson-Nyquist noise)

Bandwidth (Hz) Audio bandwidth typically 20Hz-20kHz

Temperature (°C)

Resistance (Ω) Standard audio: 600Ω, Line input: 10kΩ

Vn = √(4kTBR)

Where k = Boltzmann constant, T = temperature (K), B = bandwidth, R = resistance