{"id":"HHS-OASH-2026-0397-6903","number":"6903","name":"","organization":"EFEIA Foundation","posted":"2026-10-28T04:00Z","received":"2026-10-21T04:00Z","body":"On behalf of the EFEIA Institute (Miami, Florida), I submit our organization's attached public comment and supporting scientific research in response to HHS Request for Information, Docket No. HHS-OASH-2026-0397. This comment represents the perspective of a research entity. The attachment is an evidence review prepared under EFEIA's SPECTRA research program in September 2026. Disclosure: as the review itself states, the undersigned is founder and CTO of NOXTAK Corporation, maker of SPIRO electromagnetic-hygiene products, and no external grant funding was received for the review.\n\nSince late 2016, true wireless earbuds have placed a continuous, bilateral radiofrequency source inside the ear canal, 20 to 30 mm from the cochlea, for hundreds of millions of young people, in addition to the acoustic dose the same devices deliver. Over the same decade, clinicians in EFEIA's network and the professionals it trains have seen a visible rise in adolescents and young adults presenting with tinnitus, most of them with normal audiograms and most of them heavy users of in-ear wireless devices. In the United States, 7.5% of NHANES participants aged 12 to 19 reported tinnitus (Mahboubi et al., 2013).\n\nThe review identifies radiofrequency exposure from in-ear wireless devices as a complementary environmental toxin candidate alongside the established acoustic axis. Adolescents who develop tinnitus show a well-characterized vulnerability profile: cochlear synaptopathy that precedes audiometric loss, reduced sound-level tolerance, elevated central gain, and disturbed sleep and stress physiology. Non-thermal RF-EMF perturbs several of these same systems in animal models, with supporting signals in human provocation studies, and the convergence is strongest for oxidative stress and sleep. Where the two overlap, RF-EMF is a plausible and modifiable load on an already stressed auditory periphery. Existing studies measured phone-to-ear call time; the exposure profile of chronic earbud wear, continuous, bilateral and canal-resident, is the open research frontier, and it is the exposure young people actually receive. ITU-T H.870 already sets weekly sound allowances for these devices and can be extended to their radiofrequency emission. The review recommends a precautionary posture until direct epidemiology on this exposure profile exists.\n\nWe urge HHS to fund the review's research agenda: a repeated, school-based teenage tinnitus surveillance series with a fixed case definition that records in-ear wireless wear time from the first wave; a prospective cohort of 2,000 adolescents aged 12 to 15 with in-ear acoustic dosimeters and worn RF exposimeters, with pre-registered tinnitus and hearing outcomes at two and four years; an animal study counting inner-hair-cell synapses under chronic 2.4 GHz Bluetooth-modulated exposure at earbud-representative SAR, with and without noise; a crossover sleep study of nighttime earbud use; an exposome-first clinical tinnitus registry that records acoustic dose, wireless wear time and ambient RF-EMF at first visit; and independent SAR and field-strength dosimetry of current earbud models in child and adolescent head phantoms. Surveillance fits CDC, the cohort, sleep and animal studies fit NIH, and independent dosimetry fits FDA's Center for Devices and Radiological Health. We also ask HHS to support adding an RF-EMF characterization requirement to ITU-T H.870 through ITU-T Study Group 16 and WHO Make Listening Safe. The review sets out when the response should escalate from precautionary monitoring to active advisory: a positive synapse study, a replication of the earlier tinnitus signal in an earbud-dominated cohort, or an IARC reclassification of RF-EMF above Group 2B.\n\nThis comment responds to questions 4(m), 5(o), 5(p), 7, 8, 10(a), 10(d), 11(a), 12, 13(f), 16 and 17(a) to 17(c). The attachment is:\n\n- Machado, J. J. Bluetooth Headphones and RF-EMF in Teenage Tinnitus: Chronic in-ear wireless exposure as a complementary environmental toxin candidate. An Environmental Physiology evidence review. EFEIA Institute, SPECTRA program, September 2026 (https://doi.org/10.5281/zenodo.23519286).\n\nPlease accept and consider the attached document as part of the public record.\n\nRespectfully,\nJ. Joaquín Machado\nEMR Researcher and Director of the EFEIA Institute","attachments":["https://downloads.regulations.gov/HHS-OASH-2026-0397-6903/attachment_1.pdf"],"attachment_inventory":true,"withheld":false,"source":"https://www.regulations.gov/comment/HHS-OASH-2026-0397-6903","tags":["child-development","health-experiences","sleep-cognition","biology-metabolism","exposure-places","research-evidence"],"source_hash":"faf68337420743cbfbc583309d308ae4378b37f2b7e90a1ec797e223ca262191","slug":"child-development-comment-6903","classification":null,"forum_topics":["awaiting-review"],"primary_topic":"awaiting-review","forum_title":"On behalf of the EFEIA Institute (Miami, Florida), I submit our organization's attached public comment an…"}