Wolfgang Kraak

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Wolfgang Kraak (born June 22, 1923 in Sorau ; † April 23, 2015 in Dresden ) was a German engineer specializing in acoustics and signal analysis and professor of technical acoustics at the Technical University of Dresden .

Life

Wolfgang Kraak completed an apprenticeship as a machine fitter in Sorau and studied mechanical engineering in Ilmenau from 1939 to 1947; after that he was a soldier, new teacher and took a preparatory course. From 1947 to 1952 he studied electrical engineering at the TH Dresden . 1952 to 1956 he was assistant and senior assistant at Walter Reichardt . In 1957 he did his doctorate at the TH Dresden on the subject of "Electroacoustic measurements on spatial models". From 1957 to 1961 he was head of the acoustics department at the aerospace industry research center. From 1961 to 1966, Wolfgang Kraak was involved in setting up and managing the VEB vibration technology and acoustics Dresden. In 1965 he completed his habilitation with the thesis "Sound insulation and sound absorption of porous absorbers with open pores" at the TU Dresden. Between 1966 and 1988 he was teaching and researching at the TU Dresden. In 1969 Wolfgang Kraak was appointed full professor for technical acoustics. In 1988 he retired. In 1991 he became an honorary member of the Audio Engineering Society .

Work areas

  • Room acoustic model measurement technology
  • Sound propagation in large, flat rooms with scatterers
  • Computer simulation of sound fields in rooms
  • Sound absorber
  • Danger to hearing from noise
  • Development of the Dresden hearing damage model
  • Signal analysis and acoustic measurement technology

Awards

  • Békésy Medal of the Hungarian Optical, Acoustical and Film Technology Association (Optikai, Akusztikai és Filmtechnikai Egyesület)
  • 1994: Helmholtz Medal of the German Society for Acoustics

Fonts

Books on acoustics

  • with H. Weißing: Sound level measurement technology . Verlag Technik, 1970.
  • Investigations on Criteria for the Risk of Hearing Loss Due to Noise . In: TO-BIAS, JV
  • with W. Fasold , W. Schirmer as editors: Taschenbuch Akustik , Part 1 and 2. Verlag Technik, Berlin 1984.
  • with W. Wöhle : Elektroakustik . In: E. Philippow (Ed.): Taschenbuch Elektrotechnik , Vol. 2. Verlag Technik, 1987.
  • with G. Schommartz as editor: Applied acoustics . Vol. 1-5. Verlag Technik, 1988–1990.

Lessons and lecture notes (selection)

  • Theoretical acoustics . 2 letters for distance learning. TU Dresden, 1968.
  • Acoustic measurement technology . 2 letters for distance learning. VEB Verlag Technik, 1968.
  • Signal analysis . 3 lesson letters for distance learning. TU Dresden, 1973–1988.
  • with W. Wöhle : Acoustic waves and fields . Issue 1–4. Study material for further education. TU Dresden, 1973.

Selected publications

  • Electroacoustic measurements on room models . Dissertation, Dresden University of Technology, 1957.
  • Sound insulation and sound absorption of porous absorbers with open pores . Habilitation thesis, Technical University of Dresden, Faculty of Electrical Engineering, 1965.
  • The dynamic flow level of circular, short channels . High frequency technology and electroacoustics, 65 (1956), 46–49.
  • Sound absorption and sound insulation of porous absorbers with a very light elastic skeleton . High frequency technology and electroacoustics, 71 (1962), 86-98.
  • The determination of the sound absorption of layered porous absorbers with inclined and statistical sound incidence with an analogue computer . High frequency technology and electroacoustics, 71 (1962), 155-160.
  • Contribution to the statistical treatment of the reverberation process . High frequency technology and electroacoustics, 64 (1955), 90-93.
  • Electroacoustic measurements on room models . High frequency technology and electroacoustics, 65 (1956), 91-98.
  • with H. Ertel, G. Fuder, L. Kracht: Risk of hearing damage caused by steadystate and impulsive noise . J. Sound and Vibr. 1974, 36: 347-359.
  • with G. Hofmann: Proof of physiological stress and damage to the guinea pig's hearing after exposure to noise by means of electrocochleography . Arch. Oto-Rhino-Laryng. 215: 301-310 (1977).
  • with G. Fuder, L. Kracht: The development of hearing damage as a result of the accumulation of noise . Acustica, 38: 102-117 (1977).
  • The evaluation of the sound pressure when measuring industrial impulsive and intermittent noise . Acustica, Stuttgart 54 (1983), 84-96.
  • with G. Fuder: Recording the information capacity of the hearing in the case of inner ear damage with recruitment . In: Applied Acoustics , Vol. 1, VEB Verlag Technik Berlin 1988, 246-269.
  • Test of the individual risk of hearing damage . Acustica, Stuttgart 80 (1994), 156-165.
  • with K. Joiko, V. Bormann: Listening to language in lightweight walls . Journal Lärmbekkampf 49 (2002), pp. 79–85.

Web links

Individual evidence

  1. ^ Peter Költzsch: The Faculty of Electrical Engineering and Information Technology mourns the loss of Professor Dr.-Ing. habil. Wolfgang Kraak. at TU Dresden, Institute for Acoustics and Speech Communication . April 28, 2015. ( Memento from April 17, 2016 in the Internet Archive )
  2. ^ DEGA: Prof. Wolfgang Kraak has passed away .  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. accessed on May 4, 2015.@1@ 2Template: Toter Link / www.dega-akustik.de  
  3. ↑ Electroacoustic measurements on room models at slubdd.de, accessed on June 17, 2013.
  4. ↑ Sound insulation and sound absorption of porous absorbers with open pores on slubdd.de, accessed on June 17, 2013.
  5. ^ AES Honorary Membership Award »Wolfgang Kraak. Retrieved July 2, 2019 .
  6. ↑ DEGA: “Helmholtz Medal” ( memento from December 15, 2013 in the Internet Archive ), accessed on June 18, 2013.
personal data
SURNAME Kraak, Wolfgang
BRIEF DESCRIPTION German engineer (acoustics and signal analysis) and university lecturer
DATE OF BIRTH June 22, 1923
PLACE OF BIRTH Sorau
DATE OF DEATH April 23, 2015
Place of death Dresden