Whirring
"Whirring" refers to a continuous, rapid sound often produced by machines or devices in motion. This sound is typically associated with the operation of motors, fans, or other mechanical components. The noise can vary in pitch and intensity depending on the speed and type of machinery involved.
In everyday life, you might hear whirring from appliances like blenders or vacuum cleaners. It can also be present in nature, such as the sound made by insects like bees when they fly. The term captures the essence of movement and activity, often indicating that something is working or in operation.