The Saint
 First Officer
Flight distance : 6260171 ft
United States
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jerryway Posted at 5-11 13:47
These noise levels must be measured next to the propellers. 82/83 dB is really, really loud. Any noise over 85dB for extended periods can cause permanent hearing loss.
In reality, the noise level drops to ~55-60 dB, if you stand just a few meters away.
what does chatgpt say?
Q: Is LWA the same as dB?
A: No, LWA and dB are not the same thing, but they are related.
LWA stands for "sound power level," which is a measure of the total sound energy emitted by a source, such as a machine or an appliance. LWA is usually measured in units of decibels (dB), which is a logarithmic unit used to express the ratio of two values, such as the sound power of a machine to a reference value.
So, LWA is a measure of sound power, while dB is a unit of measurement that can be used to express many different types of ratios, including sound power. In other words, LWA is a type of measurement that can be expressed in dB.
It's important to note that dB can also be used to measure other quantities, such as sound pressure level (SPL), which is a measure of the intensity of sound waves in the air at a particular location. SPL is often used to describe the loudness of a sound, whereas LWA is more useful for measuring the noise emitted by a machine or appliance.
Read this somewhere on the Internet:
"Is LWA the same as dB?
To comply with EEC regulations all generators have to be marked in LWA this is a different measurement of sound which is taken from a different distance. for an example a quiet Honda EU20i is rated at its lowest at 52 dBA @ 7 metres on the LWA scale this would equate to approximately 88 decibels." |
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lvl.4
lvl.2
