Table 1.

Metadata for each subject

		Vowel discriminationa			Sound localization
Ferret	Implant type	Clean	CL noise	SS noise
F1311	Cooling loops	Yes	Yes	Yes	Yes
F1509	Cooling loops	Yes	Yes	Yes	Yes
F1201	Microelectrode arraysb	Control only	Control only	Control onlyc	No
F1203	Microelectrode arrays	Control only	Control only	Control only	No
F1217	Microelectrode arrays	Control only	Control only	Control only	No
F1216	Cooling loopsd	Control only	Control only	Control only	No
F1706	Optic fibers	No	Yes	No	No
F1801	Anesthetized recording	No	No	No	No
F1807	Anesthetized recording	No	No	No	No
F1814	Histology	No	No	No	No

^aVowel discrimination was tested in clean conditions, with colocated (CL) noise or spatially separated (SS) noise.

^bAnimals implanted with microelectrodes provided single-unit recordings for another study (Town et al., 2018).

^c'Control only' refers to animals tested with vowels presented from a single speaker, without cortical inactivation.

^dCooling loops implanted in F1216 were persistently blocked and could not be used reliably to achieve bilateral cooling (1 of 14 attempts).