Roanwell makes: carbon, electret or dynamic with or without amplifier, microphones. Microphones can be Confidencer type (noise cancelling) for telephones . For Aviation – Roanwell offers FAA approved microphones with switchboxes or hanger brackets. Noise cancellation is an option for all microphones. A drop-in or wired-in or hand held or boom mounted is another option. For a modem or satelite transmission Roanwell designed the Accutone type microphone.