## How to convert dB SPL to dB a?

In general you cannot convert between dB SPL and dB(A) measurements unless you know how the sound power is distributed with respect to frequency. For example a sound might have a very high dB SPL but a very low dB(A) if most of the sound power is below the frequency range that humans hear well.

**How to calculate SPL dB?**

Sound pressure level (SPL) is the pressure level of a sound, measured in decibels (dB). It is equal to 20 x the Log10 of the ratio of the Route Mean Square (RMS) of sound pressure to the reference of sound pressure (the reference sound pressure in air is 2 x 10-5 N/m2, or 0,00002 Pa).

**How loud is 225 decibels?**

110 to 225 dB – Deafening. 90 to 100 dB – Very Loud. 70 to 80 dB – Loud. 45 to 60 dB – Moderate.

### What kind of noise can damage your hearing?

Music from smartphones and personal listening devices, particularly when the volume is set close to the maximum Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing.

**How is the decibel scale used in electronics?**

The decibel, dB is a logarithmic scale used for comparing two physical quantities especially in electronics. There are several easy to remember formulas that enable the values to be calculated. Decibels, dB Tutorial Includes: The decibel, dB utilises a logarithmic scale based to compare two quantities.

**What’s the difference between a decibel and a Bel?**

The deciBel, dB or deci-Bel is actually a tenth of a Bel – a unit that is seldom used. The abbreviation for a deciBel is dB – the capital “B” is used to denote the Bel as the fundamental unit.

#### How is the decibel related to the current ratio?

Although the deciBel is used primarily as comparison of power levels, deciBel current equations or deciBel voltage equations may also be used provided that the impedance levels are the same. In this way the voltage or current ratio can be related to the power level ratio.