otofonix helix rechargeable hearing aid for seniors & adults, directional microphones for noise canceling, usa phone support otofonix the otofonix helix is our newest rechargeable hearing device for adults and seniors with mild to moderate hearing loss. now with dual directional microphones the helix deliver advanced noise canceling to allow you to better hear only what you want to. now with longer battery life and shorter charging time, never worry about fumbling with tiny batteries again.