Legal limits will surely vary from one jurisdiction (country, or state) to another. They may also vary from time to time, in the same jurisdiction. It will also depend on the circumstances. For example, if you make a certain amount of noise in your house, and disturb the neighbors, they might be entitled to complain. On the other hand, an airplane taking off makes much more noise than that, and that might be perfectly legal.
65; 85
Decibels
70-100 decibels
I have a new blender at home that I think is relatively quiet for a blender. I have measured the noise from it with my iPhone as apparently only 60 decibels when standing at a distance of 1 meter away while I was blending fruits with it. Due to this, I think that there is a very large range in the noise levels of different blenders because I have heard people claim that other blenders were 90 decibels at a distance of 1 meter and I only measured my blender as being 60 decibels at that same distance. That is a difference of 30 decibels, which is a huge difference considering that the decibel scale is logarithmic. I think that the newer blenders are probably much quieter than the older blenders were.
43db
It depends on what organism is hearing the noise. For us humans, that would be 0 decibels.
A noise that is 55 decibels loud is considered moderate in volume.
Interference with sleep is generally considered to occur when noise levels exceed 40 decibels, especially for continuous or sudden loud noises. This level of noise can disrupt or fragment sleep patterns, potentially leading to sleep disturbances or insomnia.
A noise level that measures 65 decibels is for a normal conversation on the noise scale. On this scale, 0 decibel is the threshold of hearing and 140 decibels is a jet plane at a distance of about 50 meters away.
40 decibels is similar to the noise level of a quiet library or a quiet rural area at nighttime. It is considered a low level of noise that is faint and barely noticeable to most people.
Thunder can reach up to 120 decibels at close range, which is equivalent to the noise level of a chainsaw.
The maximum allowable noise level in a residential area is typically around 55 decibels. This is considered the threshold for acceptable noise levels in residential areas.
Decibels
The unit for noise is decibels
A noise level of 70 decibels is equivalent to the sound of a vacuum cleaner or a busy street. It can be considered moderately loud and may be disruptive to some activities requiring concentration or quiet environments.
At 55 decibels, the noise level is considered moderate and similar to a quiet conversation or background music.
A noise figure is a scale of decibels.