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Decibel - Wikipedia


An example scale showing power ratios x and 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 ...

Decibel (Loudness) Comparison Chart - Galen Carol Audio


Decibel (Loudness) Comparison Chart. Here are some interesting numbers, collected from a variety of sources, that help one to understand the volume levels of ...

What is a decibel, and how is it measured? | HowStuffWorks


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

Decibels - HyperPhysics


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 ...

The Decibel Scale: What Is a Decibel (dB)? Noise and Sound Units


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

Comparitive Examples of Noise Levels | Industrial Noise Control


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

5 Sound levels in decibels: What is a decibel? - Alpine


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.

Intensity and the Decibel Scale - The Physics Classroom


Sound waves are introduced into a medium by the vibration of an object. For example, a vibrating guitar string forces surrounding air molecules to be ...

Sound and Noise - Characteristics of Sound and the Decibel Scale


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 ...

acoustics - Why is the decibel scale logarithmic? - Physics Stack ...


Mar 10, 2011 ... Logarithmic scales--whether for audio intensities, Earthquake energies, ... Therefore, the decibel scale is not just useful for calculating 3 dB ...

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dB: What is a decibel? - School of Physics


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

Dangerous Decibels » How Loud is Too Loud?


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 .

Decibel Scale | Sound | Oscillations and mechanical waves ...


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