Web Results

en.wikipedia.org/wiki/Decibel

An example scale showing power ratios x, amplitude ratios √x, and dB equivalents 10 log10 x. The decibel (symbol: dB) is a logarithmic unit used to express the ratio of one value of a ...

gbhsweb.glenbrook225.org/gbs/science/phys/class/sound/u11l2b.html

Lesson 2: Sound Properties and Their Perception. Intensity and the Decibel Scale. Sound waves are introduced into a medium by the vibration of an object.

www.khanacademy.org/science/physics/mechanical-waves-and-sound/sound-topic/v/decibel-scale

We often use this logarithmic scale to describe the intensity of sound.

www.noisehelp.com/decibel-scale.html

A readable explanation of the decibel scale (dB scale), including dBA and dBC. Also phons and sones, noise units for measuring loudness.

www.animations.physics.unsw.edu.au/jw/dB.htm

dB scale with some rough examples We said above that the decibel is a ratio. So, when it is used to give the sound ...

www.alpinehearingprotection.com/wiki/5-sound-levels-in-decibels

A decibel dB(A) is a unit of measurement that indicates how loud a sound is. Humans can hear sounds between 0 and 140 decibels.

science.howstuffworks.com/question124.htm

The decibel scale measures sound based on human hearing, which makes it one of the most unusual scientific measurements.

dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines

Decibel Exposure Time Guidelines ... see the tabs at the bottom of the page to find sound levels for settings occupational, non-occupational, military, aircraft, etc .

www.ask.com/youtube?q=Decibel+Scale&v=Q71olsPjG7Q
Jan 17, 2013 ... I'm sorry, but your reference value is completely wrong. It is not 1W/m², it is 10^(- 12) W/m²! Just look at your crying baby: assume your dB ...