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infinite plane (baffle) and of a flexible spherical cap on a rigid sphere, showing that the latter is quite similar to that of a real loudspeaker. The use of several loudspeakers arranged in an array allows special radiation characteristics. For example, one can increase the sweet spot area during stereophonic listening by making use of interaural time differences, this system was called position-independent stereo. Another application is to direct the sound to a listener without disturbing others, this is known as personal sound. Yet another application is to use quadratic phase arrays to design loudspeaker arrays that radiate just like a single loudspeaker. For loudspeaker radiation calculations the
97:". Small loudspeakers are in general not capable of reproducing low-frequency notes, but by exploiting auditory illusions one can use either the virtual pitch phenomenon to shift the low frequencies to a higher frequency band where the loudspeakers are capable, this is sometimes referred to as Ultra Bass; or, one can map the very low frequency to one single frequency where the loudspeaker is designed for high efficiency, this is sometimes referred to as Bary Bass. On the other hand, if the loudspeaker is capable of radiating low frequencies, but if they are not present in the music, those frequencies can be derived from the music using a
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co-author of more than 450 published papers and reports and has been credited with more than 250 patent applications, including more than 175 U.S. (more than 100 of which were granted). For his creative contributions at
Philips, he received the company's Gilles Holst Award (1999), the Gold Invention Award (2012) and the Diamond Invention Award (2018).
50:), Eindhoven, Netherlands, in 1977. His research initially involved servo systems and signal processing for use in both Video Longplay players and compact disc players. In 1984 he joined the Acoustics Group at Philips working on developing CAD tools and signal processing for loudspeaker systems. In 1994 he became a member of the
72:(TU/e) since 2006, where he mainly supervises Master and PhD students. Since 1990 he has been president of the Aarts Consultancy. In 2019, he retired from Philips and now focuses mainly on his academic and consultancy work, the latter encompassing both technical and intellectual property (IP) advice.
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Aarts and his coworkers at
Philips have also been involved in the design and applications of loudspeaker radiation. An extended version of the Zernike polynomials, known as ENZ, was applied to solve forward and inverse problems in acoustic radiation of a flexible circular piston surrounded by a rigid
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A small loudspeaker in a special housing can generate synthetic jets that offer advantages over a fan, such as higher efficiency, greater design freedom, and less noise and wear. Experiments have shown that for small surfaces up to approximately 40 cm, the synthetic jets cool better and make
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On small TVs and portable audio equipment, the speakers are close together. With special signal processing, so-called phantom or virtual sources can be made so that the sound seems to be generated far outside the loudspeakers. This principle has been applied by
Philips to many TV and audio sets,
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In 2003 he became a
Philips Fellow and extended his interests in engineering to medicine and biology, in particular sensors and their signal processing for ambulatory monitoring, sleep, cardiology, perinatology, drug response monitoring (DRM) systems, and epilepsy detection. He is the author or
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scheme, this is sometimes referred to as Infra Bass. Finally, the audio quality, especially from high Q low-frequency sound transducers, can be improved by attenuating decay parts of bass signals thereby reducing sustain or ringing for bass notes, this is sometimes referred to as punchy bass.
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Aarts and his collaborators at
Philips have been involved in the development, improvement, and hardware implementation of bass enhancement/restoration systems exploiting the natural psycho-acoustic phenomenon known as the
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One of Aarts’ quotes is: "I’m an advocate for the four P’s: People (Cooperations), Patents (Engineering), Papers (Science), and
Products (Valorization). Those four P’s have been keeping me ticking for over 40 years."
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196:"E. Larsen and R.M. Aarts, Audio Bandwidth extension. Application of Psychoacoustics, Signal Processing and Loudspeaker Design, J. Wiley, September 2004, ISBN 0470 85864 8"
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n recognition for outstanding contributions to research and applications of signal processing in acoustics and sound reproduction.
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Fellow and was awarded their silver medal in 2010. He was also co-organizer and chairman of several international conventions.
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179:"An overview of papers in the field of loudspeakers and sound reproduction produced by the chair of SPS' on AM of the TU/e"
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153:(PPG). A PPG sensor can easily be built into a bracelet such as a sports watch, preferably extended with accelerometers.
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He married
Doortje Ultee (1956-2009) in Krommenie on 14 September 1978. From their marriage two sons were born.
532:"Overview of Photoplethysmography (PPG) related papers produced by TU/e-SPS chair on Ambulatory Monitoring"
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He became an IEEE Fellow in 2007 and receiving their
Chester Sall Award in 2017 and in 1998 he became an
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430:"Comparing sound radiation from a loudspeaker with that from a flexible spherical cap on a rigid sphere"
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22:, (born 1956), is a Dutch electrical engineer and physicist, inventor and professor in the field of
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Ronald M. Aarts received a BSc degree in electrical engineering in 1977 and a PhD in physics from
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A list of published articles and US-patents can be found on the homepage of Ronald M. Aarts.
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made a commercial for this in 1996, which was set on Wall Street in NYC.
511:"Synthetic Jet Cooling Part I: Overview of Heat Transfer and Acoustics"
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234:"Benoemingen en onderscheidingen op het Nat.Lab - PDF Free Download"
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is often needed, simple approximations have been derived for this.
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Monitoring of, e.g., epilepsy, sleep, and heart problems such as
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405:"NijboerZernike.nl - Extended Nijboer Zernike Analysis (ENZ)"
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under the commercial name 'Incredible sound'. The director
248:"Part-time professor EE has a hundred patents to his name"
447:"Position independent stereo sound reproduction"
262:"IEEE Fellows Directory - Alphabetical Listing"
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141:Ambulatory or unimpeded patient monitoring
68:Aarts has been a part-time professor at
368:Hardware for ambient Sound Reproduction
324:"Pump up the bass and let others sleep"
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42:in 1995. He joined the Optics group at
16:Dutch electrical engineer and physicist
106:Loudspeaker arrays and their radiation
593:Delft University of Technology alumni
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132:Acoustic cooling with loudspeakers
70:Eindhoven University of Technology
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209:Beyond physics for superior sound
480:Stereoverbreding Dirk van Delft
40:Delft University of Technology
30:signal processing technology.
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608:21st-century Dutch physicists
598:20th-century Dutch physicists
44:Philips Research Laboratories
613:20th-century Dutch engineers
603:21st-century Dutch engineers
559:homepage of Ronald M. Aarts
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578:Dutch acoustical engineers
343:What the ear doesn't hear.
588:Scientists from Amsterdam
299:Audio Engineering Society
63:Audio Engineering Society
52:Digital Signal Processing
137:less noise than a fan.
46:(formerly known as the
341:Financial Times , 1997
88:Bass sound enhancement
392:U.S. patent 8,934,643
379:U.S. patent 6,961,435
354:U.S. patent 6,134,330
119:Stereo base widening
583:Fellows of the IEEE
497:luerzersarchive.com
147:atrial fibrillation
99:bandwidth extension
95:missing fundamental
151:photoplethysmogram
409:nijboerzernike.nl
83:Professional work
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544:14 December
414:14 December
572:Categories
366:RMA Papers
305:22 October
211:tudelft.nl
165:References
28:biomedical
493:"Philips"
126:Spike Lee
34:Biography
294:"Awards"
221:Lemma 1
26:and in
561:tue.nl
539:tue.nl
518:tue.nl
48:Natlab
535:(PDF)
514:(PDF)
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