# Sound Intensity Calculator

Enter the value of sound intensity and the reference intensity in the decibel calculator. Click calculate to find the sound intensity level.

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The sound intensity level calculator finds the value of sound in decibels. This information helps to know how intense a sound is. You can find any of the three values by entering the remaining two.

Sound intensity is the energy or power by which sound waves travel across a medium. It varies with objects. For example, a closing door will produce less sound as compared to an elephant trumpeting.

## What is the Sound intensity level?

The sound intensity level is a ratio between any sound and the faintest sound that is possible for humans to hear. It is written as;

IL (β) = 10 log10 (I/I0)

Here I is sound intensity and I0 is the reference intensity. It is measured in decibels. DSound intensity is represented by the beta symbol β.

Humans can hear sounds between a range. This range is 10-12Wm2 to 1Wm2. The sound of frequency 10-12Wm2 is called zero bel and it is also the reference intensity.

## How to find sound intensity level?

Since the formula involves a logarithm, it can be tricky. So the best and suggested way is to use the intensity level calculator.

But for your convenience, the manual method is explained through an example below.

Example:

If the intensity of a sound is 124 Wm-2 then find its intensity level.

Solution:

Step 1: Identify the values.

Sound intensity = 124 Wm2

Reference intensity = 10-12 Wm2

Step 2: Put the values in the formula:

β = 10 log10 (I/I0)

β = 10 log10 (124/10-12)

β = 140.932 db

## Sound Intensity Table

 Examples Intensity (Wm2) Decibels Silence 10-12 0 Breathing 10-11 10 Rustle of leaves 10-10 20 Whispering 10-9 30 Refrigerator, computer hum 10-8 40 Rain 10-7 50 Conversation 10-6 60 Shower, flush, car 10-5 70 A truck, loud radio 10-4 80 Lawnmower, hairdryer 10-3 90 A helicopter, subway train 10-2 100 Trombone, rock band 10-1 110 Airplane on taking off, police siren 10 120 Threshold of pain 102 130 Fireworks 103 140 Gunshot 104 150 Fighter jet 105 160 Rocket launch 106 170