The news comes after the FDA approved the sale of certain hearing aids over the counter (OTC), allowing sales in stores like Walmart, Best Buy, CVS, and, now, wireless carrier stores.A carrier may seem like an unlikely partner, but Eargo CEO Christian Gormsen says the benefit comes from the customer service support, as shoppers may be buying a hearing aid for the first time without an audiologist's support."Consumers can actually engage with a trained sales consultants because you have trained people there without the crazy traffic you see in a Costco or Walmart," Gormsen says.They create an FDA-approved category of hearing aids for mild to moderate hearing loss and allow them to be sold in stores without requiring an audiologist prescription."They could be available at your local gas station," says John R. Luna, CEO of Nuheara, which created a new OTC hearing aid with HP that starts at $699."