SBIR Projects

The primary source of RTH funding has been the Small Business Innovative Research (SBIR) program. Listed below are SBIR projects that RTH was awarded; a number of them involve active noise control (ANC). John Parkins was the lead grant writer and principal investigator on all projects.

Centers for Disease Control and Prevention (NIOSH)

Noise Dosimeter Earplug

National Institutes of Health (NIDCD)

ANC Hearing Aid

Hearing test system incorporating ANC


Novel Passive Attenuation Earplug

Hear-Through Headset for Carrier Deck

Ear Impression Technique Using Medical Imaging

Database For Digital Ear Impressions


Novel ANC Transducer

US Air Force (AFRL)

Communications Earplug With ANC