ADEL™ is the world's first and only patented technology that safely delivers a louder, more spacious and richer sound - all while avoiding the risk of hearing damage caused by earbuds.
Stephen Ambrose, speaking above at Autodesk's Accelerate 2016 Conference, invented in-ear monitors, an advanced earbud used by professional musicians on stages around the world. This invention became today's earbuds. When he saw the resulting damage he returned to the lab and with National Institute of Health and National Science Foundation funds solved the problem by creating a second eardrum.
He's toured with artists like Stevie Wonder, Rush, Simon and Garfunkel, Kiss, and Diana Ross to develop his professional audio products. And today, he’s ready to help bring another innovation to market.
Why? Because too many teens, young adults and professional musicians suffer from hearing loss today and will experience even more in the future. In fact, the proportion of teens with mild or worse hearing loss has increased 77% since the 1990s. And their studies prove the loss is due to earbud use. According the the LA Times, once hearing is damaged it will never recover.
Fact: Earbuds cause hearing loss...
Stephen discovered that when the ear canal is sealed by an earbud, the speaker vibrations create acoustic pressure. In the confined space of the closed ear canal, these become harmful amplified pneumatic pressures and cause the eardrum to move with an amplitude thousands of times greater than normal. Tiny muscles around the eardrum then tighten to protect the ear by dampening the sound. To overcome this dampening you must turn up the volume. The more the volume increases, the more the eardrum tightens. And so on. And so on.
40 million Americans suffer from hearing loss. For 10 million Americans, the hearing loss is noise induced, not reversible and permanent.
Stephen found a way to break the cycle. It’s called ADEL™ and it’ll change the way you hear music. This technology adds a second eardrum into all of our earbuds. This second eardrum takes the punishment of the pneumatic pressure caused by sound in the ear canal, and delivers clear, crisp sound that’s unlike anything you’ve ever heard. And it’s not louder noise coming from your earbuds.
Actually, with ADEL™, it’s quieter – often operating at 1/10th the amplified in-ear power levels of traditional listening devices (per studies conducted at Vanderbilt University Medical Center). And by not prematurely tightening in-ear muscles, which can dramatically compress the volume, loud sounds actually sound louder and require less overall volume levels. The results from the Vanderbilt University Medical Center study show that using ADEL™ allows listeners to enjoy Enhanced Loudness Perception (lower volumes sound significantly louder and better over conventional devices). This provides them a louder yet safer, high fidelity listening experience at greatly reduced power levels (1/4 to 1/16th typical levels) with no perceived loss in volume.
For other technical papers by and about Asius and its technology, please refer to ones posted below:
Mitigation of Excessive Acoustic Compliance and Trapped Volume Insertion Gain in Ear-Sealing Listening Devices
presented to the Audio Engineering Society
Acoustical Analysis of the Frequency-Attenuation Response of Musician Earplugs - a Third Party Whitepaper
presented to the Journal of Communication Disorders, Deaf Studies & Hearing Aids
Presentation by Staab, Ambrose, Ricketts, Leuder & D’Onofrio
presented to the American Audiological Society
|Motion of the Surface of the Human Tympanic Membrane Measured with Stroboscopic Holography||
Acoustic Mechanisms that Determine the Ear-Canal Sound
Pressures Generated by Earphones