Attenuation Calculator
Calculate voltage attenuation and signal loss in electrical circuits
Calculate Signal Attenuation
Initial signal voltage before attenuation
Final signal voltage after attenuation
Attenuation Results
Formula used: dB = 20 × log₁₀(Vout / Vin)
Input voltages: Vin = 0.000V, Vout = 0.000V
Power ratio: 0.0000 (0.00%)
Signal Analysis
Example Calculation
Input: 240V → Output: 190V
Calculation: dB = 20 × log₁₀(190/240) = 20 × log₁₀(0.792) = 20 × (-0.101) = -2.029 dB
Result: Signal attenuated by 2.029 dB, retaining 79.2% of original voltage
Attenuation Reference
High Attenuation
< -20 dB
Signal severely weakened
Moderate Attenuation
-20 to -10 dB
Noticeable signal reduction
Low Attenuation
-10 to -3 dB
Acceptable signal loss
No Loss
≈ 0 dB
Signal unchanged
Common Applications
Wi-Fi signal strength over distance
Radio and TV signal transmission
Electrical circuit signal loss
Telecommunication systems
Audio equipment and sound systems
Understanding Signal Attenuation
What is Attenuation?
Attenuation refers to the gradual weakening or reduction in the intensity of a physical quantity as it travels through a medium or system. In electronics, it represents the decrease in signal strength as it passes through circuits or transmission media.
Why is it Important?
- •Prevents device damage from excessive power
- •Optimizes signal quality over distance
- •Critical for telecommunication systems
- •Helps in noise control and signal management
Formula Explanation
dB = 20 × log₁₀(Vout / Vin)
- dB: Attenuation in decibels
- Vout: Output voltage after attenuation
- Vin: Input voltage before attenuation
- log₁₀: Base-10 logarithm
Note: Negative dB values indicate signal loss (attenuation), while positive values indicate signal gain.