Noise

Noise (of . It is mostly a schallsignal, that a not appropriate Sound event characterized, z. B. Engine noises. With noise all become Tongemische designated, which consist of very many single tones and if the frequency differences than 16 cycles per second are predominantly smaller. It is not therefore an acoustic signal with numerous single frequencies, between those according-to-law connection exists and of them Amplitudes, Phases and statistically vary. That a Geraeuschs is therefore a continuous, whereby however by periodic procedures single tones can occur, which are overlaid the wide-band noise portion. Such single tones increase the interfering effects of a Geraeuschs considerably and must therefore with the result of measurement by a "clay/tone addition" be considered.

Some Percussion instruments how , Basin produce no sounds separate only noises.

As noise one defines a frequency complex, the all contains of the human audio range. With the white noise all frequency portions are also represented equal strong amplitude (each equal portion loud); become the higher frequency portions constantly more weakly speak one of pink noise, in Synthesizer meet one often also noise generators with designations "talk" and "Blue" about potentiometers, which to the audio exit differently can be added respectively. the relationship of the frequency portions in their sense manipulate. By means of different filters a tremendous quantity "raw material" can be represented for the most diverse noises from white noise.

A noise defines itself as sound event, with which the individual Frequenz(an)teile does not swing on integral multiples of the deepest frequency (basic clay/tone/basic frequency). A special group form Bell sounds their first overtones frequently already one Third, or , which correspond however to the harmony teachings. With a noise also no simple oscillation conditions can be found like z. B. 2/3, 4/5. One if already comes rather on conditions like 53/2469, 724/927 or the like, however never somewhat which with the theory of the harmony would be linkable.

Also no periodic events in the zeitverlauf of individual Teil(klaenge) can be found, however the different portions are modulated nearly in each case. One can illustrate oneself this well, by one the sound of a moving body (jeep with too much charge, carriage, course, etc..) in an environment with reflection possibilities (houses, mountains, tunnels...), the sharpening noises on the underground caused those presents again our ears over constantly changing points of reflection (surfaces) reached. In addition the constantly changing humming noises of the drive come. All that together draws the typical noise z. B. a mountain railway, an airplane or an explosive sound which out. By the constantly changing portions a noise can be also defined finally, respectively. one can recognize it. As example are here the difference between a rather coincidental temporal operational sequence (natural origin) or however periodic or constantly very similarly running (technically or human origin).

To the music since experiments that already applies (Karl Heinz stick living, Pierre Schaeffer, OSCAR Sala, etc..) noises and sounds as equal material. One could state something similar also over classical music (drums, basin, rammers). However and gave there are music music styles those without noise bodies again and again functions, thus at kirchenchoeren (jazz choirs nearly always schnippen with noise) or medieval counterpoint.

Web on the left of

• Noise data base

{{this article describes the sound event. For the album of the same name to that volume the physicians see Noise (album).}}