1. All hearing aids can work with the Thinklabs One Digital Stethoscope using headphones. A good pair of music headphones with good bass will provide excellent sound without having to removing your hearing aids. Some hearing aids can connect to the One using a streamer.
2. However, only streamers that have a 3.5mm audio jack can connect to the stethoscope with an audio cable. Note: For this connection, your hearing aids need to be closed-fit.
Please see this link for more information on how hearing aids work with the One.