SNR Rechner

Berechnen Sie signal-to-noise ratio in dB aus power or voltage levels. Essential for communications und audio.

Signal Power

Noise Power

SNR

30.0 dB

SNR (linear)1,000.0

Noise as % of Signal0.100 %

SNR vs Signal Power

Formel

SNR compares the level of a desired signal to the background noise level. Higher SNR means a cleaner signal.

SNR (dB) = 10 x log10(P_signal / P_noise)

For voltage measurements: SNR (dB) = 20 x log10(V_signal / V_noise)

60+ dB: Excellent (hi-fi audio)

40-60 dB: Good (voice communication)

20-40 dB: Fair (some degradation)

< 20 dB: Poor (significant noise)

Signal power of 100 mW with noise power of 0.1 mW.

What SNR do I need for clear audio?

For speech intelligibility, 15-20 dB is minimum. For music, 60+ dB is expected. Professional recordings target 90+ dB.

How do I improve SNR?

Increase signal power, reduce noise (shielding, filtering, lower noise components), or use signal averaging.

Is SNR the same as SINAD?

No. SINAD (Signal-to-Noise-and-Distortion) includes harmonic distortion in the denominator, making it a stricter metric.

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