decibels measure the intensity of sound.
Sound is measured in decibels. Decibels are units used to measure the intensity of sound. The highest decibel alarm clock available is 120 decibels, which can be compared to be as loud as the sound of a fire engine siren.
The total energy in a specific sound can be measured but that is not the normal way of reporting sound energy.Sound energy is typically characterized as power (energy per unit time) per unit area. The standard units (SI) of sound intensity are W/m2 (watts per square meter).When sound is measured by a sound meter, the result is often reported as a "Sound intensity level" that is expressed in decibels and compared to a defined standard of one picowatt per square meter.There are other measures, such as "sones" which are meant to characterize perceived loudness, but that it not a standard (SI) measure.In standard units then, total energy would be joules, power would be watts, intensity would be watts per square meter.
The intensity of sound is measured in a unit called the decibel (dB), which describes the relative intensity of a sound based on an algorithmic decibel scale containing values ranging from 0 to 194. A zero value on the decibel scale represents the weakest sound audible to humans and sound intensity increases in correspondence with numeric values, the relationship among the values on the decibel scale is not linear but algorithmic. Here is an example of the decibel scale http://www.explainthatstuff.com/soundlevelmeters.html
Units used to measure loudness are Sone (loudness N) and Phon (loudness level L). Scroll down to related links and look at "Loudness - Wikipedia" and "Sound level change and the change of the respective factor of volume and loudness".
A sound level meter is used to measure the intensity of sounds, typically in units of decibels (dB). It consists of a microphone to pick up the sound and electronic circuits to convert the sound into a digital display of the intensity level.
"Decibels"
Sound pressure level (SPL) is a commonly used metric to quantify the loudness or intensity of sound. It is expressed in units called decibels (dB) and provides a relative measure of how powerful a sound wave is compared to a reference level. SPL values are logarithmic, meaning a small change in dB corresponds to a significant change in sound intensity.
decibels measure the intensity of sound.
a decibel
decibel
A unit used to measure the intensity of a sound or the power level of an electrical signal. Someones voice could raise by a decibel.It is used to measure the sound intensity and loudness.
Your ears and the sound pressure level meter "measure" the sound pressure of a sound wave. Sound intensity is measured in watts per square meter.Intensity is measured in watts per square meter.Note: Sound power (sound intensity) is the cause -and the sound pressure is the effect.The effect is of particular interest to the sound engineer.
Sound intensities are typically measured in decibels (dB), which is a logarithmic unit used to quantify the intensity of sound. The decibel scale compares the intensity of a sound to a reference level, usually the threshold of human hearing.
Several units are used, depending on what you want to measure. For example, in the case of sound, you can use units of energy, of intensity (energy/area), of wavelength, frequency, speed, and probably a few more.
The intensity of sound is most often measured by the Decibel meter. It can also be called the sound level meter or the dB Meter. It is used to accurately and objectively measure the sound or noise that one can hear.
Sound intensity is often expressed in decibels (dB), which is a logarithmic unit that measures the ratio of a sound's intensity to a reference intensity. Alternatively, sound intensity can also be expressed in watts per square meter (W/m^2).