If your hearing aid is making a whistling noise, then you are hearing feedback in your device. Sound that was supposed to go into your ear canal has escaped the ear instead and been picked up by the hearing instrument’s microphone. The sound then becomes reamplified and put out of the speaker. This can happen when the hearing aid does not fit properly. If you are experiencing a whistling noise in your hearing device, come see us at our clinic so we can have your hearing aid refitted.