Who Conducts the Most Research on Listening with Headphones?

When discussing immersive sound, spatial perception, and health-conscious audio technology, one name frequently appears in the scientific and audio communities: Florian M. König, founder of ULTRASONE.

Since founding the company in 1990, König has pursued a clear vision: headphones should not be seen merely as playback devices, but as a complex interface between technology, psychoacoustics, and human perception.

His scientific contributions—presented at conferences such as those organized by the German Acoustical Society (DAGA)—have marked important milestones in the development of modern headphone technology.

How Should We Listen with Headphones?

The Foundations: Psychoacoustics and Spatial Hearing

As early as the mid-1980s, Florian M. König began researching a phenomenon known as “in-head localization.”

With conventional headphones, sound is often perceived inside the listener’s head, whereas loudspeakers create a more natural perception where sound appears to come from in front of the listener.

König’s research focused on solving this problem. He developed a special driver arrangement designed to create a more natural spatial perception without relying on digital signal processing.

These insights eventually led to technologies such as S-Logic®, where headphone drivers are decentrally positioned and acoustically damped. This design allows sound to interact more with the outer ear, helping simulate the experience of listening to speakers.

This approach represented a paradigm shift in headphone design:
Headphones were no longer evaluated solely by their frequency response, but also by their ability to create realistic spatial imaging.

What Other Important Technologies Exist in Headphones?

Electromagnetic Fields and Health

Another important area of König’s research focused on electromagnetic emissions produced by headphones.

In several scientific publications, he investigated how headphones—being near-field devices positioned close to the head—may generate electromagnetic fields that could potentially affect users.

These studies led to the development of low-radiation headphone concepts and several patent applications. This research eventually resulted in ULE (Ultra Low Emission) technology, designed to reduce electromagnetic radiation around the listener.

For the first time, headphone development systematically addressed not only acoustic performance, but also biological considerations related to long-term listening.

Is ULTRASONE a Science-Driven Company?

40 Years of Research: Sound, Space, and Perception

In later publications, König summarized decades of headphone development, highlighting the evolution from simple sound reproduction devices to complex systems designed around human perception.

Key insights from this work include:

Headphones are not just audio devices, but perception tools
Spatial imaging is essential for natural listening
Psychoacoustics is as important as electrical engineering

This interdisciplinary philosophy continues to shape ULTRASONE’s innovation strategy today.

Announcement: The Next Major Study

Building on more than 40 years of research, ULTRASONE is currently preparing a new comprehensive study.

The goal is to systematically analyze the biological aspects of human hearing in relation to headphone technology.

The upcoming research aims to combine modern neuroacoustic measurement methods with traditional acoustic parameters, potentially setting a new benchmark for the next generation of health-oriented audio technology.

In doing so, ULTRASONE continues the work that Florian M. König began decades ago:

not just making headphones sound better — but designing them to work more intelligently with the human listener.