Resume of my education and professional experience:
Below is detailed my education as well as the professional experience and my hobbies.
BSc in Electronics1979-1983
The final project was a system for analysis of the free-field response of a loudspeaker system using a normal living room through the use of Fourier-analysis of the time response from the loudspeaker recorded before the echo arrived from the boundaries of the room. The project was conducted in coorporation with a fellow student and was graduated to 11.
My special interest area was analogue electronics and it was my wish to work with consumer electronics of high quality, i.e. stereo amplifiers and loudspeakers. However, reality pointed in another direction and my experience has been the devlopment of test systems for the measurement of different quantities.
I started at a small company, Kinovox (Lynge). The company sold microphones and headphones from Sennheiser as well as other products for the recording industry. The development department designed apparatus for "old friends" to the director so we made any possible or impossible systems for the customers. I met the microprocessor here and was astonished by its possibilities. I learned to program in assembler and to interface to periphery hardware such as analogue electronics and motors. In addition to this I designed small-signal electronics and power amplifiers.
I was 4 years at Kinovox and 1 year at Brüel og Kjær (Nærum), but I got bored and was engaged for a short wile at Engineering and Application Software (Roskilde). I managed to solve a measurement problem before I quitted the job and was unemployied for 3 month where I gained experience by programming in Pascal.
I was employed for 7 years at Telco (St. Heddinge), at this time called Engineering and Manufacturing Consulting. The company produced sensors to the industry for control of garage doors and counting packages on a convoyer belt. It gave good knowledge for the application of infrared components and the detection of weak signals buired into noise. I gained the responsibility for almost all components in addition to the job of managing the CAD system and EMC compliance testing.
It is a great challenge to pass knowledge on to others and I was engaged with this issue through the teaching of beginners programming in BASIC (AOF in Roskilde).
In the period from 1992 to 1994 I followed a series of courses for the basic musical line at The University of Copenhagen (Københavns Universitet). I was interested in musical theory; such as the arrangement of music.
There is an interesting parallel to the engineering field. The form theory is step for step identical to an engineering course in top-down programming. Both courses deals with structured planning.
My last employment at microLEX Systems (Hørsholm) lasted for 9 years. The company build custom-designed test systems. My job was to fill empty spaces - in a manner of speaking. Test systems are rather complex and are primarily build from modules bought from different sources. The company brought the modules together through software and my job was to build what could not be bought. This have included knowledge of analogue and digital circuitry, microprocessors and programming in C.
MSc in Acoustics2004-2006
The interest within the field of sound remained unchanged so I decided to quit my job and follow courses held at The Technical University of Denmark (Danmarks Tekniske Universitet) and I graduated 2006 as Master of Science in Acoustics. The final project was Diffraction at Loudspeaker Cabinets and was graduated to 10.
Diffraction is an important parameter, which infludenes the amplitude response by approx 10 dB within the critical middle range; however, it has been negleced by most sources. If at all mentioned, it is described as an illness, which can be cured using a filter to boost the bass range. If an improvement at all, it is not sufficient, and it neglects the fact that diffraction is related to the orientation of the loudspeaker and the position of the listener within the listening room.
I was employed August 2006 as an electro acoustic consultent at Embedit, a company that offers engineers with different profiles to other companies. My first assignment was at GN ReSound as an acoustician with the responsibility for the sound quality of a headset, and following this I am an internal consultant for the review of a design, and support for a colleague understanding the software interface to a FFT-algorithm. Embedit was later bought by Data Respons in order to enhance the leadership of the danish section of Data Respons. I am at August 2008 moved to the Skanderborg department, since Hanne and I moved to Jutland. The first assignment here was to solve a problem measuring the signal from a piezo-electrisc transducer and building a prototype, and after this I am assigned a series of taskt at Vestas, reviewing code written in MATLAB and SimuLink, and finally writing testprograms for the verification of software, including programming in C++.
Data Respons moves to larger office located in Skejby at February 2010, and I am fired the same month due to ”rationalisation and consolidation of operations due to declining market”. The oral explanation was that I had a somewhat "special" profile. Well, that is hard to disprove, since the last three and a half years of employment has been "specialised" to acoustics, electronics and software.
Well, I have now experienced to be fired, and the company allowed me to be free so I can concentrating on searching for a new job and enhance my skills. I follow a course within sound technology and continues my study with the support from a teacher at DTU covering room acoustics.
I have from Data Respons got the accept to follow a study within room acoustice, which I feel is missing, and the study is executed while I am concluding the employment. I write three theoretical rapports within reverberation, absorption og diffusion, and at the same time emitting in excess of 100 applications for jobs within the local area. The rapports are transmitted to a teacher at the Technical University of Denmark for evalueation.
The danisk committy for sound technology (Dansk Lydteknologi) requests ideas or papers on the improvement of the sound quality for outdoor concerts and I submit a theoretical work for a directive bass loudspeaker. This results in an invivation to participate within a larger arrangement at the large annual festival at the town of Roskilde (Roskilde Festival). There are obviously a need of improving the sound quality within the bass range and I start thinking.
I start September 2010 as an associate professor within electronics at the Engineering College at Aarhus, Denmark. My responsibility is assisting students while conducting their third-semester projects (almost 40 students) where they are working on the design and building of measurement equipment. The students are working surprisingly professional dueing the project planning and reviewing phases and my contribution is mainly to "repair" when the theoretical basis is not sufficiently strong.
The engineering college is involved within a research project for medical and I an engaged with the development of circuitry for the measurement of ECG and water balance as well as wireless communication, which proves an interesting challenge.
A short introduction to projects where I have had the main responsibility.
|Production testing of mains power meters (LK)||Generator for 3-phase U/I-groups. Z80 micro controller system. Signal attenuation. Power amplifier block of 200 W for up-transforming to 230 V, and bridging to 600 W for down-transforming to a current loop.|
|Cut Counter (DR)||Detection af cuts, turns and silent tapes. Analogue hardware for signal detection. Z80 micro controller system and programming within assembler. User interface through keyboard and display. Control of two reel motors (110 V AC).|
|Watch for ferries (DSB)||Printing of come and go times for DSB-ferries. Z80 micro controller system and programming within assembler. FSK-communication for synchronisation with the terrestrial station and printer output for documentation.|
|Telephone answering machine (Kinovox)||System definition, mekanical design and design of the backplane.|
|Module with 3½" floppy disk. Z80 micro controller system and programming within assembler.|
|Module with DRAM chips. Hardware with on-board refresh.|
|Module with EEPROM chips. Hardware.|
|Module for programmering of EEPROM chips. Z80 micro controller system and programming within assembler.|
|Module for replay of recordings stored within an EEPROM. Digital components for control, an exponential digital/analogus-converter and filter circuit.|
1987-1988, Brüel og Kjær
|Clock module||Design proposal and design of the hardware for a programmable clock signal generator.|
|Productions testing||Test and adjustment of the production.|
|Measurement issue||The leakage current of a protection cirtuit was so large that it biased the signal to be measured.|
|Test system for 4 & 8 channels light curtain||Hardware for simulation of a light curtain. Programming within Pascal for user interface and control of hardware through RS232. Selection between mellem several system configurations.|
|Detection principle||Modification of a detection system (PA-series) and optimising the receiver. The previous models did not fully use the tone decoder and were seriously dependent upon the device parametres.|
|Light curtain with 3 channels||Development of a new detection principle, thus saving a special component with cheap standard components. At short optical range (3 m versus 15 m) the signal level was sufficient to use a standard digital schmitttrigger for detection, and that reduced the cost, especially since there was three channels.|
|Light curtain with 64 channels||Development of a low-cost multiplex system (SpaceGuard), where a micro controller friendly detection principle was used. The productet was so popular that a special production plant was build for this sole product.|
|Environmental testing and design rules||Theoretical work of the EMC directive implementation.|
|Construction fo a lab for EMC testing.|
|High-frequency oscillator for the test of immunitet to induced noise.|
|Research||Theoretical work for new sensor seriew (SM6000).|
|Control unit||Development of a new control unit (PPA14), thus introducing the micro controller within the low-budget models.|
|Infra red sensor||Development of new sensor (LR-C), where the idea was to move the carrier frequency up in order to remove interferense from modern ballasts. The bandwidth was enhanced from 5 kHz to 50 kHz. The metal cover of the photo-sensitive device was used as scresn (it has previously been an antenna for noise injection).|
|EMC-test||Responsible for upgrading the products to comply to theEMC directive through theoretical study and countless measurements at Jyske EMC, Øst.|
|Transducer interface (Danfoss)||Board (SCX-353) for interface to puls sources.|
|Test of OpAmp (CNES)||Board for characterising IC amplifiers.|
|Test of RF-chip (CNES)||Board for characterising a RF chip.|
|Protection board (CNES)||Board for unloading a digital teststation from high-tension break down.|
|DUT interface (CNES)||Theoretical work for the construction of a test interface board.|
|Interface board (Ericsson)||Theoretical work of the interface between te test system and the test-jig. A description of new principle for the construction of the test fixture.|
|Interface boards (several boards)||Boards for the interface between the test system og the test-jig. Conversion between connectors from different types of modules.|
|Data acquisition system (Danfoss)||Module for interfacing to transducers and logging of the measured values. Design specification, advanced interface protocol, mechanical design.|
|Test interface (several modules)||Module (HearMASTER) for interface to microphone, teles coil and loudspeaker. Containing, among others, a power amplifier and interface to the data acquisition board.|
|Differential probes||Modules for analogue interface with extremely low noise and distortion. Translation between single-ended and differential signals (both directions). Several variants regarding amplification and bandwidth.|
|High-speed digital I/O (NOKIA)||Module (PEU) for characterisation of digital chips. Digital control up to 40 MHz and measurement of analogue parameters of the digital inputs and outputs. Definition of the communication protocol for hardware _controlled sequencing of commands and parrallel setup of several boards. Programming within C for 8051-type micro controller. Compensation of hardware offset and serious self testing.|
|High-voltage digital I/O (COTAS)||Module for interface to 0-30 V logic (industrial PLC). 32 channels with programmable levels and protection against high currents and high temperature.|
|Test fixtures (NOKIA)||Board for verification of function. Wire-wrap for self testing of 3 systemes.|
|Test interface, general purpose||Module (FlexROUTER) for testing chips. Analogue and digital interface to the chip or hybrid for characterising and test of functionality.|
|Test interface, video sync||Module (VideoCTU) for testing commercial video components. Extraction of the synchronisation signals and a counter for trigning at a given line within the TV-picture.|
2006-2010, Data Respons
|Headset (GN ReSound)||Verification of the acoustical quality of a Bluetooth headset for snap-on to an existing hearing aid. Serious work determining the characteristics according to standards within tele communication.|
|Magnetical charger (GN ReSound)||Theoretical work determining the amount of power that can be transferred through a magnetic link.|
|Review||Internal review of the design for an amplifier and filter circuits and assistance to a programmer understanding the interface to a FFT routine implementet within an 8 bit micro controller.|
|Interface (Linak)||Development of an interface to a piezo-electrisc transducer and construction of a prototype.|
|Test programs (Vestas)||Review of MATLAB and SimuLink code and writing test programs within C++.|
2010-20xx, Engineering college
|Project guidance||Assisting students while conducting their third-semester projects.|
|Research project||Development of medical sensor interfaces.|
|Teaching||Introducing the students to circuitry imperfection.|
|Amplifiers||2 x 10 W power amplifier.|
|2 x 15 W power amplifier and modular preamplifier with RIAA-correction, bass/trebele-controlls and a variable low-pass filter (-18 dB/oktav).|
|2 x 30 W power amplifier and symmetrical, DC-couplet preamplifier with RIAA-correction.|
|1 x 15 W power amplifier for center bass with continously variable cutoff.|
|Loudspeakers||Closed cabinet with 6" Seas fulltone loudspeaker.|
|Closed cabinet with 8" Philips fulldtone loudspeaker.|
|Bas-reflex loudspeaker with 6" bass og 1" dome loudspeakers.|
|Frontloaded conical midrange horn with 4" Philips fulldtone loudspeaker.|
|Frontloaded exponential mindrange horn with 4" Philips midrange loudspeaker.|
|Frontloaded bass/midrange horn with 6" Seas loudspeaker and 1" treble horn.|
|Rearloaded horn with Corel 8" loudspeaker.|
|Rearloaded horn with Peerless 12" loudspeaker. Serious modification of a Schmacks-horn.|
|Lab measurement devices||Power supply: 3 to 30 V, 2 A and ±5 to ±15 V, 0,5 A.|
|Oscillator: Several types up to approx. 2 MHz.|
|Sound pressure meter with selectable sensitivity, 1/3 octave filter and RMS display.|
|Light meter with selectable measurement of visible or infra-red light.|
|Synthesizer||Monophonical synthesizer with exponential voltage-controlles oscillators, filter and amplifier. Inspired by the Mini-Moog, but entirely my own design.|
|Organ||Chamber organ with temperature-stable oscillators, voltage-controlled amplifier and interpolating filter section. This enabled low-pass filtering of the squarewave signal from the oscillators into a useful sinus oscillation, or differentiation into a useful diapason. In addition, the output was stereophonic.|