Decibels are a logarithmic measure of a factor or a ratio and that has really nothing to do with metric or imperal.
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Decibels are a unit of measurement used to express the intensity of sound. They are not considered either imperial or metric, as they are a logarithmic unit that does not directly correspond to physical dimensions like length or weight.
I was taught the imperial system whilst a schoolboy in the UK, many years ago. So I prefer imperial rather than metric. But, as metric is becoming the norm, I have become familiar with both systems.
Acres are a unit of measurement commonly used in the imperial system, mainly in the United States and a few other countries. They are not part of the metric system.
Metric or Imperial
Metric sockets are measured in millimeters while imperial sockets are measured in inches. Metric sockets are commonly used in countries that use the metric system, whereas imperial sockets are used in countries that use the imperial system. It's important to use the correct type of socket to match the measurement system of the fasteners being used.
In imperial measurements the 'long ton' or 'UK ton' is 2240lbs (pounds) or, in metric 1,016.0469088 kg (kilograms). The 'short ton' is 2000lbs The metric 'tonne' is 1000kg which equates to about 2205lbs