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
US Navy (NAVAIR)
Novel Passive Attenuation Earplug
Hear-Through Headset for Carrier Deck
Ear Impression Technique Using Medical Imaging
Database For Digital Ear Impressions
US Army (USAMRMC)
Novel ANC Transducer
US Air Force (AFRL)
Communications Earplug With ANC