# What is the decibel of a baby's cry?

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## What is a decibel (dB) ?

The decibel is derived from the bel, a unit of sound power measurement. It is actually a ratio, and has no meaning for absolute value:bel = log(P1/P2)decibel = 10*log(P1/P2)For actual sound measur... Read More »

## What is a decibel meter?

A decibel meter, also known as a dB meter, is used by to put a numerical value on the subjective loudness of a sound.FunctionA decibel meter measures the sound-pressure level (SPL) of a given sound... Read More »

## How many watts is in a decibel?

It doesnt work that way. Watts represent the power output of the amplifer. Decibels, or db, are a function of the output volume. This is a function of the impedence of the speaker (ohms) and how ef... Read More »

## What is the decibel level of a jet plane?

The sound of a jet plane at takeoff (100 feet) is approximately 120 to 130 decibels (dB). The sound of the engine of a stationary jet is approximately 140 decibels (dB). Prolonged exposure to sound... Read More »

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