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12 lip 2024 · In the CGS (Centimeter-Gram-Second) system, the unit of sound intensity is typically expressed in ergs per second per square centimeter (erg/s/cm²). This unit measures the energy transferred through sound waves per unit area over time and is commonly used in scientific and engineering contexts.
The unit of sound is decibel (dB) and is defined as the ratio of sound pressure to reference pressure. The other units are hertz, sone, watt per square meter and phon.
One cluster, based on the centimeter, the gram, and the second, is called the CGS system. The other, based on the meter, kilogram, and second, is called the MKS system. The ratio between a CGS unit and the corresponding MKS unit is usually a power of 10.
Define intensity, sound intensity, and sound pressure level. Calculate sound intensity levels in decibels (dB). In a quiet forest, you can sometimes hear a single leaf fall to the ground. After settling into bed, you may hear your blood pulsing through your ears.
A unit called a phon is used to express loudness numerically. Phons differ from decibels because the phon is a unit of loudness perception, whereas the decibel is a unit of physical intensity.
Sound intensity levels are quoted in decibels (dB) much more often than sound intensities in watts per meter squared. Decibels are the unit of choice in the scientific literature as well as in the popular media. The reasons for this choice of units are related to how we perceive sounds.
While sound intensity (in W/m 2) is the SI unit, the sound intensity level in decibels (dB) is more relevant for how humans perceive sounds. The way our ears perceive sound can be more accurately described by the logarithm of the intensity of a sound rather than the intensity of a sound directly.
