Sound Units Conversion

Convert Bel (B), Decibel (dB) & Neper (Np) Sound Units

Sound units conversion tool. Enter a value below and select the units to convert. The result is rounded to 4 decimal places by default.

Sound is the wave of air molecules caused by the motion of an object. No movement means no sound. If the object moves faster and vibrates more, it means higher frequency and louder the sound. Sound travels at different rates in different media. In dry air, sound travels at 331.6 meter/sec at 0 C.

The most common sound unit is decibel (dB), it's 1/10 of bel (B). The other sound unit "neper (Np)" is rarely used.

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