SNR Rechner
Berechnen Sie signal-to-noise ratio in dB aus power or voltage levels. Essential for communications und audio.
SNR
30.0 dB
SNR vs Signal Power
Formel
## Signal-to-Noise Ratio SNR compares the level of a desired signal to the background noise level. Higher SNR means a cleaner signal. ### Formula **SNR (dB) = 10 x log10(P_signal / P_noise)** For voltage measurements: **SNR (dB) = 20 x log10(V_signal / V_noise)** ### Reference Points - 60+ dB: Excellent (hi-fi audio) - 40-60 dB: Good (voice communication) - 20-40 dB: Fair (some degradation) - < 20 dB: Poor (significant noise)
Lösungsbeispiel
Signal power of 100 mW with noise power of 0.1 mW.
- 01SNR linear: 100 / 0.1 = 1000
- 02SNR dB: 10 x log10(1000) = 30.0 dB
- 03Noise fraction: 0.1 / 100 x 100 = 0.1%
Häufig Gestellte Fragen
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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