| 1979..1987 | Study of mechanical engineering at the university of Hannover (measuring technique) |
| 1982..1987 | assistant at the institute for measuring techniques in mechanical engineering of the university of Hannover |
| 1987..1990 | Development engineer (acoustics) at Stankiewicz, Celle (sound isolation systems for vehicles) |
| 1990..1996 | Development engineer (noise and vibration, total vehicle) at a west German automotive producer |
| Since 1996 | Technical specialist test methods (noise and vibration, total vehicle) at the same west German automotive producer |
Publications:
| 1985 | Dipl.-Ing. Th. Ahlersmeyer, Dipl.-Ing. Gahlau; "Absorptionsgradbestimmung unter realistischen Einbaubedingungen mit Hilfe der Schallintensitätsmeßtechnik am Beispiel eines Kfz-Dachhimmels"; VDI-Conference "Schalltechnik '88", VDI-Report No. 678, 1988 (in German) |
| 1992 | Dr.-Ing. U. Fingberg, Dipl.-Ing. Th. Ahlersmeyer; "Geräuschpfadanalyse einmal anders - einer neuer Ansatz aus der Praxis"; Conference "Geräuschminderung bei Kraftfahrzeugen", Haus der Technik, Essen 1992 (in German) |
| 1998 | P. Gu, J. Juan, D. Griffiths, T. VanCamp, U. Fingberg, Th. Ahlersmeyer: "Inverse Matrix vs. Stiffness: Lessons Learned", Conference IMAC/TES, Novi (Michigan) October 1998 |
Hobby loudspeaker development:
| 1979..1980 | First theory push when reading the books of H.H. Klinger |
| 1980..1981 | Second theory push reading the articles of R.H.Small. A.N.Thiele etc. |
| 1981..1982 | First serious loudspeaker project (AUDAX MDH24P37RSM, AUDAX MHD12P25FSM, PEERLESS SKO10DT)Photo; groundwork for a plugable dividing network (first parts, with DIN loudspeaker plugs) |
| 1983 | Participation on a contest of the hi-fi magazine STEREOPLAY with an ultra compact 6. order bassreflex system with passive radiator using the first double voice coil chassis of FOCAL (calculation with self-written program on SINCLAIR ZX81))Photo |
| 1983..1984 | Several 2-way-systems with AUDAX, FOCAL and VIFA chassisPhoto |
| 1984 | 1. small series (6 pairs) with AUDAX MHD24P45TSM, AUDAX MHD12P25FSM and VIFA DT25G5)Photo in semi-anechoic measurement room |
| 1985 | Upgrade and transfer of loudspeaker calculation program to SINCLAIR ZX Spectrum |
| 1985 | Large high-end floor standing monitor with AUDAX HD33S66D in 120 l 6. order bassreflex system, AUDAX MHD17HR37RSM and FOCAL T120FC(row enclousire with active highpass filter) |
| 1985 | Compact (12 + 8 l) bandpass subwoofer with satellites |
| 1986 | 2. small series of low cost floor standing box with WESTRA KW160 in 35 l bassreflex system with passive radiator and AUDAX HD100D25 (4 pairs); Measurements and Photo of 14 year old box! |
| Up to 1987 | Continuous study of loudspeaker literature from the store of the technical library of the university of Hannover |
| 1988 | Upgrade of the plugable diving network with banana plugs and additional RCL parts(Photo, Detail) |
| 1989 | 1. revision (dividing network) of the large high-end floor standing monitor |
| 1989..1990 | Upgrade and transfer of loudspeaker calculation program to PC with self-developed graphical user interfaceScreenshot |
| 1990 | Modular PA-system with 2*20cm bass, 20cm bass/mid and VIFA H25TG5(Photo) |
| 1992..1993 | Upgrade and transfer of loudspeaker calculation program to Atari (GFA-Basic) |
| 1993..1994 | BANG & OLUFSEN like design loudspeaker made from 10cm diameter plastic drainpipe with 2x 10cm TELEFUNKEN-woofers and AUDAX TW74 tweeter(Photo) |
| 1994 | Purchase of a pair of SPENDOR 20/1 loudspeakers as a result of a 1,5 year long search for the 'perfect' loudspeaker |
| Since 1996 | Development of a 1/n-octave real-time analyzer program for PCs with SoundBlaster®-compatible soundcard (SB_OCT) |
| 1996..1997 | Development of a medium sized high-end floor standing monitor with AUDAX HM170G0 (30l bassreflex), AUDAX HM170Z0 (12 l closed box) and SCAN SPEAK D2905/9300 (DoppelWhopper) |
| 1996 | Car hi-fi system for FORD Escort wagon with 13cm WESTRA (front doors) up to 600 Hz and VISATON FRS5 on instrument panel (above 600 Hz) |
| Since 1997 | Several car hi-fi consultations |
| 1998 | 2. revision of the large high-end floor standing monitor (exchange of tweeter with SCAN SPEAK D2905/9700 and adaptation of diving network) |
| Since 1998 | Several consultations in the field of room acoustics |
| Since 1999 | I document my activities on my loudspeaker homepage |
