Words4EV.speak 1.0 (en)

Drumming

Drummingis is an ill-defined sound, very low-frequency , high in level and erratic. One may say it beats up, similar to a drum or timpani. Drumming corresponds to a “Rolling” sound where the dull aspect has been pushed to extreme with an erratic impacting component. It causes a physiological inconvenience, extremely discomfortable and a pressure sensation on ears reminding the “Humming”. Drumming appears at low speed on a identified range of speed between 10 and 50 km/h on a type of road surfaces with specific solicitation (ex: bad surface or pavement roads.)