This is an Online meeting. We ask you to sign up here for a free ticket, since that will tell us how many people will attend and we can plan accordingly.

The Zoom link will be sent two days before the event, via email to all ticket holders who sign up before the end of the meeting.

Traditional earphones and hearing devices create a sealed system that traps pneumatic pressure in the ear canal. This trapped pressure has long been linked to discomfort, listener fatigue, and even long-term hearing damage. ADEL® (Ambrose Diaphonic Ear Lens) was created to solve this problem by introducing a soft, compliant “second eardrum” that absorbs harmful pressure before it reaches the delicate structures of the inner ear, allowing the user to turn the volume down and not have to brute-force a solution.

By mimicking the way the human ear naturally vents, ADEL reduces the stress on the eardrum while preserving and even enhancing sound quality. Listeners report a more open, spacious soundstage and greater detail at safer listening levels. In fact, studies have shown that with ADEL, people can perceive sound as being just as loud at lower decibel levels, dramatically lowering the risk of noise-induced hearing loss. This innovation has earned recognition from both musicians and audiologists as a safer, healthier way to experience high-fidelity sound.

Stephen Ambrose, whose pioneering work in the 1960s and 70s brought IEMs to legendary performers like Stevie Wonder, remains at the forefront of protecting and improving human hearing. His decades of experience in music, acoustics, and ear health converge in the ADEL design, bridging artistry and science. Ambrose’s vision was not only to improve audio quality but also to safeguard hearing for generations of listeners, professional musicians, and people relying on hearing aids.

Today, ADEL stands as the first technology that truly combines hearing preservation with enhanced listening enjoyment. Whether in professional audio, consumer music devices, or medical hearing solutions, the ADEL innovation represents Stephen Ambrose’s lifelong mission: to deliver sound that is immersive, accurate, and safe—restoring both the joy of music and the health of hearing.

This AES PNW meeting was made possible by serendipity: when former Chair Dan Mortensen recently connected with Charlie Morgan (President of pioneering Seattle-area sound reinforcement and installation company Morgan Sound), he learned that Charlie, who has been functionally deaf in one ear since he was a child, had been involved in the development of ADEL and has been a tester for the various iterations of it. He has the newest version and, amazingly, is able to hear again in that ear.

Dan was happily stunned and reached out to Asius Technologies and invited Stephen to share details of his new technology with us. Stephen enthusiastically agreed, and Charlie will also join us at the meeting to give his first-hand experience.

We hope to see you there.