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 (dB) is a logarithmic unit used to express the ratio of two values of a physical ...

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.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.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.

science.howstuffworks.com/question124.htm

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

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.industrialnoisecontrol.com/comparative-noise-examples.htm

Noise Source. Decibel Level. Decibel Effect. Jet take-off (at 25 meters) Recommended product: Outdoor Noise Barriers. 150. Eardrum rupture. Aircraft carrier ...

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.epd.gov.hk/epd/noise_education/web/ENG_EPD_HTML/m1/intro_5.html

Loudness and the Decibel Scale. Another property of sound or noise is its loudness. A loud noise usually has a larger pressure variation and a weak one has ...

hyperphysics.phy-astr.gsu.edu/hbase/Sound/db.html

The decibel scale is a reflection of the logarithmic response of the human ear to ... The sound intensity in decibels above the standard threshold of hearing is ...