Audible alarms are available that have sound levels as soft as 55 dB at 2 feet and as. Their loudness ranges roughly from 240 dB to over 280 dB - only big volcanic eruptions are louder! The chart below shows where some common sounds fall on this dB scale.
Levels and sources of damaging noise include: 85 100. Nuclear explosions are amongst the loudest phenomena on Earth. Keep in mind that exposure to sounds higher than 110 decibels can cause instantaneous hearing loss. It was so loud that it ruptured eardrums of people 40 miles away, travelled around the world four times and was clearly heard 3,000 miles awayĪnd.
#SOUND DECIBEL CHART DOWNLOAD#
Download and print the Inverse Square Law chart - Sound pressure level reduction vs. This - the Inverse Square Law - can be expressed in a diagram like.
So an intensity of 1,000 is twice as loud as an intensity of 100. In a free field - a doubling of the distance from a noise source reduces the sound pressure level with 6 decibel. For every 3 dBAs over 85dBA, the permissible exposure time before possible damage can occur is cut in half.
#SOUND DECIBEL CHART SKIN#
The decibel scale is a bit strange because of the sensitivity of the human ear which can pick up everything from the sound of a fingertip brushing lightly over the skin to the sound of a loud jet engine - quite a difference! DBĭid you know - The world's loudest sound was the sound made by Krakatoa when it erupted in 1883. To make a sound twice as loud, you need to multiply its intensity by about 10. The decibel (dB) is used to measure sound level.
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