Use our Sound Pressure Level to Decibels Distance Calculator to determine how sound intensity changes with distance. Ideal for acousticians, engineers, and audio enthusiasts, this tool helps predict SPL drop-off and manage noise levels effectively.
Formula:
The formula to calculate the Sound Pressure Level (Lp2) at a new distance (r2) given an initial Sound Pressure Level (Lp1) at an initial distance (r1) is:
Lp2 = Lp1 - 20 * log10(r2 / r1)
- Lp2: Sound Pressure Level at the new distance (in dB)
- Lp1: Initial Sound Pressure Level (in dB)
- r1: Initial Distance from the sound source (e.g., in meters or feet)
- r2: New Distance from the sound source (e.g., in meters or feet)
Note: r1 and r2 must be in the same units.