Jeremy Marozeau Photo by Anne-Sophie Poirer

New professor with specialty in perception of music for people with cochlear implants

Friday 05 Sep 14


Jeremy Marozeau
Associate Professor
DTU Health Tech
+45 45 25 47 90

CV Jeremy Marozeau

Born in Paris 1975.
Married to Sophie with two children, Octave at 8 and Eulalie at 6, and live in Copenhagen, Vesterbro.
Plays the bass.

1995-1999 Lausanne: EPFL
1999  Milano: Final year Research Project

2000-2001 Paris, IRCAM, Master

2001-2004 Paris, IRCAM, and Berkley, University of California, PhD

2004 – 2005 Research Engineer CNRS, Marseille, France
Research engineer for the Acoustic lab of the French National Center for Scientific Research (CNRS)
Worked on a new model to predict the loudness of the impulsive sounds


On August 15, Jeremy Marozeau has joined the faculty in Hearing Systems. Dr. Jeremy Marozeau comes from a position as a Research fellow at the Bionics Institute, Australia. His research focuses on the perception of music and voice pitch information for people with a cochlear implant (CI).

Jeremy Marozeau did his Ph.D. part of Perception and Musical Cognition team at Institute for Music/Acoustic Research and Coordination (IRCAM, Paris) and as an invited researcher at Center for New Music and Audio Technologies (CNMAT) of U.C. Berkeley. After working at the French National Center for Scientific Research (CNRS, Marseille) on modeling the loudness of impulsive sounds, he continued his research on loudness as Research Associate at Northeastern University, Boston with Dr. Mary Florentine.
How did your interest for this area begin?
“When I was a teenager I played the bass in a rock band. I was quite tempted to be a musician, but I thought I wasn’t talented enough, and I also wanted to keep my music as a hobby. I didn’t want to compromise that,” Jeremy Marozeau explains with an accent that is both French and Australian.
Originally Jeremy is from France, but his work and engagement in science and music perception has brought him to many places in the world.
Because of his interest for both technology and science, Jeremy Marozeau went to an engineering school, EPFL (École Polytechnique) in Switzerland. He graduated in micro technology but was more interested in sound processing, and for his 4th year research project Jeremy went to Milano.
“In the computer Music Lab I was happy to discover the field of computer music, which mixes computer software and music,” he tells.

The field of psychoacoustics
Jeremy Marozeau then decided to do his master in Paris and received his doctorate from the University of Paris-VI, Institute for Music/Acoustic Research and Coordination (IRCAM).
“It is a crazy place with lots of musicians and scientists in the same place. It was there I discovered the field of psychoacoustics. I thought it was really interesting because it brought the human element into the technical aspect. It was fascinating to be able to understand how the brain and the auditory system work and how we are able to distinguish the difference between the instruments for instance a piano and a guitar.
How does it do this?
We are extracting some auditory features from the spectral and temporal envelope of the sounds. Both are very important. For instance, if you compare an oboe and a trumpet you will find that they sound quite dissimilar. But if we artificially remove the attack time of both instruments, they will sound surprisingly similar. You have to integrate a lot of different features to help you to decide and understand which instrument it is. It is the same with the voice. You are able to recognize a person by listening to these small fine different features. And I think it is amazing, that the brain is able to do that,” he says.

Cochlear Implants

Jeremy Marozeau’s specialty is cochlear implants.
“With CI you get a lot of limitation. People often think that just like a pair of glasses can restore vision, a cochlear implant can restore the hearing ability perfectly. That is not the case. With a CI most people will be able to perceive speech quite efficiently, and will be capable to communicate in a quiet environment. With this device you get about 20 electrodes that are going to stimulate all the auditory nerves. That will allow you to extract the main features from speech. But when it comes to other types of signals, like music, there are some limitations and many people with CI will have difficulties of enjoying music. The signal is so poor that they will not be able to get that. For me it would be terrible to live a life without being able to listen to music. That is why it is a field that is quite close to my heart.”
After his PhD Jeremy Marozeau went to Marseille for a year and then to Boston, where he worked three years as Research Fellow and also as a teacher.
“After my PhD I changed the topic a bit and went to Boston in order to try to understand how people with hearing impairment perceive sounds. It really opened up to me the field of audiology, and I enjoyed dedicating my life to people in need,” he says.

Bionics Institute in Melbourne
But after three years Jeremy Marozeau missed working in the music field, and then found a position in Melbourne (Bionics Institute) that was about improving music perception in people with CI.
“It was great to be in this environment where a lot of big things have happened. It was like working with the people who went to the moon for the first time in this particular field.”
The Bionics Institute had at that time also implanted the first bionic eye and the researchers were working with deep brain stimulation for people with epilepsy or different kind of depressions.
Jeremy Marozeau worked at the Institute and lived there with his family, a wife (also French) and two children for six years and then thought it was time for a change.
“ I wanted to be in a university position and I also wanted to do more teaching, which I really enjoy. Coming back to Europe was also a wish. It is also great for research, because it is easier to collaborate with different groups here in Europe than in Australia,” he explains.
Had you heard about Hearing Systems before?
“Yes, I knew the work of Torsten Dau. That was something that really attracted me. And Torben Poulsen [Ed.Retired professor from Hearing Systems 2013]. I had heard about that group when I worked with Mary Florentine whose husband Søren Buus was a well known Danish scientist and Mary Florentine told me a lot about Denmark.
Now that you have stayed a few weeks in Denmark, how is your impression so far?
“I felt very welcome and everybody has been nice to me from the start. It is a very interesting university and there is a strong cohesion in the research group. The city is also really nice, and I enjoy riding my bike everywhere. It is great to be in Copenhagen where you don’t have to fight with cars. The first thing I bought here was a cargo bike. And my wife is very happy as well, she grew up in Paris and is really a ‘city girl’,” he smiles.

"It is fascinating how the brain and the auditory system work and how we are able to distinguish the difference between the instruments"
Jeremy Marozeau

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