What term describes a hearing aid that is used but refurbished to restore its original condition?

The term that describes a hearing aid that has been used but refurbished to restore its original condition is "reconditioned hearing aid." This designation indicates that the device has undergone a process to restore its functionality and appearance, making it comparable to a new device for the user. Reconditioning typically involves cleaning, repairing any technical issues, and replacing worn-out parts.

In contrast, a "new hearing aid" refers to a device that has not been previously owned or used, while a "used hearing aid" implies that it is simply a second-hand device without any assurance of refurbishment or repair. A "defective hearing aid" describes a device that is not functioning properly and may require repair or replacement, rather than being restored to a usable state. Thus, reconditioned is the most accurate term for a hearing aid that has been refurbished to meet original specifications.