Not clear whether your assignment is:
'recording objects' - recording (verb gerund) objects (noun) -
In which case, you need to find some ancient old Grundig with hippy attached -
or go to a recording studio and document a session.
Another option - a Nagra film sound recording machine in situ (Brazilian Rainforest? Bird house London Zoo, Kew Gardens, Holland Park?) with sound recordist attached?)
Could be a lie detector session in situ,
a surveyor with a damp meter,
a builder with an electronic tape measure as they start work on the Olympic Park;
surveyors with theodolites in the street;
traffic warden taking pics of cars in street,
police monitoring Notting Hill Carnival from Scotland Yard HQ;
The cameras in Barking / Dagenham that shout at people to pick up the litter they just dropped;
Recording devices at the race course, at football matches, at greyhound stadiums, at Wimbledon, speed cameras, the devices used in police stations to record suspects' interviews, the CCTV in supermarkets; the recording devices at the London Marathon
- actually, although this seemed to me, initially, to be the most boring option, the possibilities are endless.
Or 'recording objects' - recording (adjective) objects (noun):
in which case the world is your oyster!!! The world is jampacked with objects just waiting for you to record them!!!