Assuming we are talking about sound, intensity measures the power in a sound wave. Mathematically, it is the product of the sound pressure and the particle velocity, and is measured in watts per square meter.
Loudness usually refers to the (subjective) perception of sound intensity by people. It is related to intensity, but also depends upon frequency. The human ear perceives increases in sound intensity roughly on a logarithmic scale, so for example the sound intensity needs to increase by about a factor of ten to create the perception that the sound is twice as loud. This is the motivation for the decibel system, which measures sound intensity on a logarithmic scale.
the Decibel it measures the loudness and intensity
Yes the loudness of a sound is called its intensity.
By its amplitude. Really loudness is sound intensity & intensity depends on square of amplitude ie. higher the amplitude higher the intensity which means higher the loudness.
intensity. :)
intensity
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the Decibel it measures the loudness and intensity
Yes the loudness of a sound is called its intensity.
By its amplitude. Really loudness is sound intensity & intensity depends on square of amplitude ie. higher the amplitude higher the intensity which means higher the loudness.
Loudness is the colloquial term and intensity is the scientific term. More the intensity higher the loudness. Same way in case of light, higher the intensity of radiation, we call colloquially that as more brightness.
Loudness is really a subjective measure and is often confused with objective measures in decibel units of sound pressure or sound intensity.
Sound intensity or acoustic intensity can be calculated from the objective measurement of the sound pressure. The loudness is a psycho-acoustic subjective feeling, which is difficult to measure.
This is closely related to the intensity, i.e., power per unit area.
Intensity
intensity :)
intensity
intensity. :)