"Electrical recordings" refers to the process of capturing and storing sounds using electronic devices. It involves converting sound waves into electrical signals, which can be saved and played back later. Full definition
From studies of electrical recordings of the rat hippocampus (an area of the brain associated with memory formation and storage), made while the rats were awake and learning a maze, Wilson and Louie found that some electrical patterns were quite specific and identifiable, depending on what the rat was doing. (discovermagazine.com)
One clue came from dual electrical recordings showing that amacrine cells were capable of delivering an inhibitory signal to the «null direction» side of a retinal ganglion cell by releasing the neurotransmitter GABA. (kavliprize.org)
The hair cells formed normal bundles (see images) that responded to sound waves and signaled the brain, as measured by electrical recordings. (sciencedaily.com)