Apps & Tools
Noise Floor Calculator
Enter your mic and preamp specs to estimate system noise floor, headroom, and SNR for speech recording.
Microphone
Microphone
Preamp
Preamp / Interface
Preamp Gain — 30 dB
Results
Mic Self-Noise—
Estimated Noise Floor (dBFS)—
Headroom from -18 dBFS target—
SNR for speech at 74 dBSPL/1m—
Rating—
Calculation note: Noise floor ≈ mic self-noise (dB SPL-A) − 94 dBFS (0 dBu reference) + gain. SNR = 74 dBSPL − mic self-noise. These are simplified approximations — real-world results vary based on acoustic environment, cable quality, and power supply noise.