Spl calculator formula Combining decibels - adding up to 10 incoherent acoustic levels The decibel calculator can be used to combine the levels of up to ten incoherent (noncoherent) electric or acoustic sources when the level of each source is known in decibels (dB). The estimation relies on simple acoustic rules of thumb: doubling power ≈ +3 dB, while doubling distance ≈ −6 dB. First, we need to understand the difference between power, intensity and pressure level… In a typical system, an amplifier will provide an electrical signal to a speaker. What is a Sound Pressure Level Calculator? Definition: This calculator computes the sound pressure level (L p) in decibels (dB) based on the formula L p = 20 log 10 (p / p r e f), where p is the sound pressure and p r e f is the reference sound pressure (typically 2×10⁻⁵ Pa or 20 micro Pascals, corresponding to 0 dB). If you need a refresher on sound waves, look at our sound wavelength calculator. It is a measure of how well power to a speaker is converted to sound energy. Sound Pressure Level (SPL) calculation To calculate SPL, you take the ratio of the sound pressure to the reference level of sound pressure and then take the logarithm (base 10) of that ratio, and then multiply by 20. This tool calculates the SPL at a specified distance away from an amplifier speaker combination. How It Works The SPL calculator works by taking the input values provided and performing the following calculation: SPL = Ambient Noise Level (dB) + Speaker Sensitivity (dB) + (10 * log10 (Signal Strength / (Distance^2 * Area))) – Reference Speaker SPL Calculator Speaker Sensitivity (dB/1W/1m): Amplifier Power (watts): Distance from Speaker (meters): Calculate I’m going to show you how this calculator works. Jun 29, 2024 · Click the ‘Calculate’ button to get the calculated Sound Pressure Level (SPL) in decibels (dB). jpz guy 3x6uhg dch l1ipw 1ewn3i cfsfqt wuxj rohwto k7w