The movement of these objects, however intense, disturbs the air. Similar to a stone thrown in a pond. These movements travel through the air to reach our ears. The faster the movement of the thing, the higher the frequency of the sound. The high-pitched screech of a jet engine is of a higher frequency that low frequency bass beat of a hi fi system.
Sound becomes noise when it becomes undesirable.
Several definitions exist but for our purposes noise can be considered undesired or unnecessary sound of such a level, duration or type to disturb our work or rest periods. Although it might be thought that noise has to be extremely loud to make an impression other noises can equally annoy us. The constant thud of a bass beat, the whining of a distressed animal, sudden or unexpected sounds, such as a faulty alarm system. Noise, in effect, is subjective. It is a matter of personal tolerance.