#surface_noise__surfacenoise  noise produced by the friction of the stylus of a record player moving over the rotating record
  supertype:  background_noise__ground_noise  extraneous noise contaminating sound measurements that cannot be separated from the desired signal
     supertype:  background_signal__background  extraneous signals that can be confused with the phenomenon to be observed or measured; "they got a bad connection and could hardly hear one another over the background signals"
        supertype:  interference__noise__disturbance  electrical or acoustic activity that can disturb communication
           supertype:  trouble  an event causing distress or pain; "what is the trouble?"; "heart trouble"
              supertype:  happening__occurrence__natural_event__naturalevent  an event that happens
                 supertype:  event  something that happens at a given place and time
                    supertype:  process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                       supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  process_or_process_description
                          supertype:  processing_thing
                             supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                                supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes surface_noise; click here to add one.