Kostenloser Schall Druck Level Rechner
Berechnen Sie SPL in decibels aus sound pressure. Kostenloser SPL = 20*log10(p/p0) Rechner.
Sound Pressure Level
94.0 dB SPL
Sound Pressure Level vs RMS Sound Pressure
Formel
## Sound Pressure Level (SPL) SPL quantifies the RMS sound pressure relative to the threshold of hearing on a logarithmic scale. ### Formula **SPL = 20 * log10(p / p_0)** where p_0 = 20 micro-Pa = 2 x 10^-5 Pa is the reference pressure corresponding to the threshold of human hearing at 1 kHz.
Lösungsbeispiel
A sound wave with RMS pressure of 1 Pa.
- 01SPL = 20 * log10(p / p_0)
- 02SPL = 20 * log10(1 / 0.00002)
- 03SPL = 20 * log10(50000)
- 04SPL = 20 * 4.699 = 94.0 dB SPL
Häufig Gestellte Fragen
What is the reference pressure p0?
20 micro-pascals (2 x 10^-5 Pa), chosen to match the approximate threshold of human hearing at 1 kHz.
How does SPL relate to sound intensity level?
Both use dB but SPL uses pressure (20 * log10) while intensity level uses power (10 * log10). They yield the same numeric value under standard conditions.
What is a typical SPL for conversation?
Normal conversation at 1 meter is about 60 to 70 dB SPL.
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