Psychoakustik

the Psychoakustik is a subsection of the Psychophysik. It is concerned with the description of the connection of the human feeling of sound (hearing event) with its physical sound field sizes (sound event). The processing of physical signals to an impression of the sound is modelled thereby in several stages.These are assigned to the individual ear and cognitive signal processing.

Purely physical parameters prove such as level, frequency, range, to illustrate duration or modulation factor on hearing-fair parameters as appropriate. Usually thereby several physical dimension affect in each case a psychoakustische size. This is as individual feeling independently of other feelings to be judged can. The scales of psychoakustischer sizes describe the strength of the feeling.

Important applications of the Psychoakustik lie in the sound impact research, telecommunications, the audio compression and the clay/tone organization.

Table of contents

psychoakustische parameters

the most frequent psychoakustische parameters are the pince-nez parameters soundness (unit sone), sharpness (unit acum), pitch (unit mel), roughness (unit more asper) and fluctuation strength (unit vacil). Besides are Tonhaltigkeit and Impulshaftigkeitimportant sizes; they are consulted also with the education by evaluation levels.

methods

Psychoakusti tests raise subjective judgements from test subjects. Since these persons judge individually, the results of the tests become only valide on the basis a statistic evaluation of a multiplicity of judgements. The methods toCollection of the judgements into classical and adaptive methods is divided, whereby the distinction lies in the fact that the process of an adaptive test is affected by the judgements of the test subject, while the classical methods remain unaffected by it.

Classical methods are: Constant stimulus method, size size of, a regulation method and complete pair comparison.

Adaptive methods are: Forced Choice methods (2-AFC, 3-AFC, 4-AFC) and Békésy Tracking.

scientists

meaning work come from

  • Hermann from Helmholtz (1821-1894)
  • Carl stump (1848-1936): Clay/tone psychology, 2 volumes 1883 to 1890 (Hauptwerk)
  • H. Fletcher and W. A. Munson: (1933)
  • Robinsonand Dadson: (1956)
  • J. F. Schouten: (1940)
  • Eberhard pince-nez
  • Stanley Smith of Stevens (1906-1973)
  • Jens blue ore (*1938)
  • George von Békésy (1899-1972): Experiment in hearing, different one well-known acoustic deceptions

- comparable the more well-known optical deceptions - the Komplexizität illustrates 1960 (transient wave theory) of theHearing.

see also

Web on the left of

literature

 

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