Because the scale is logarithmic, you cannot simply add decibel numbers together.

: A decibel always requires a reference point. In acoustics ( dB SPL ), the reference is

: If one sound is significantly louder than another (by 10 dB or more), the quieter sound barely affects the total decibel reading. Measuring Decibels

: Many free apps are available on the Google Play Store or Apple App Store. While convenient for general checks, they may lack the calibration required for official evidence.

: Named after Alexander Graham Bell, a decibel is literally one-tenth of a "Bel". The Bel itself was found to be too large for common precision.

Decibel Today

Because the scale is logarithmic, you cannot simply add decibel numbers together.

: A decibel always requires a reference point. In acoustics ( dB SPL ), the reference is Decibel

: If one sound is significantly louder than another (by 10 dB or more), the quieter sound barely affects the total decibel reading. Measuring Decibels Because the scale is logarithmic, you cannot simply

: Many free apps are available on the Google Play Store or Apple App Store. While convenient for general checks, they may lack the calibration required for official evidence. Because the scale is logarithmic

: Named after Alexander Graham Bell, a decibel is literally one-tenth of a "Bel". The Bel itself was found to be too large for common precision.