Noise

of these articles describes the sound event. For the album of the same name to that volume the physicians see noise (album).

A noise (of noise) is a nonperiodic sound event with unsettled Zeitverlauf, to which no pitch can be assigned. It forms thereby oneContrast to the clay/tone and to the sound. It is a Schallsignal, which mostly characterizes a not appropriate sound event, z. B. Engine noises. Noise all Tongemische are named, of very many single tones to consist and if the frequency differences predominantly smalleras 16 cycles per second are. It is therefore an acoustic signal with numerous single frequencies, between which no according-to-law connection exists and whose amplitudes, phases and frequencies statistically vary. The spectrum of a Geräuschs is therefore a continuous, whereby however by periodicProcedures of single tones to arise can, which are overlaid the wide-band noise portion. Such single tones increase the interfering effects of a Geräuschs considerably and must therefore with the result of measurement by a “clay/tone addition” be considered.

Some percussion instruments such as drum, basin do not produce sounds separate only noises.

As noise one defines a frequency complex, which contains all frequencies 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, inSynthesizer meets one often also noise generators with designations “talk” and “Blue” about potentiometers, which can be added to the audio exit differently respectable. the relationship of the frequency portions in their sense manipulate. By means of different filters a tremendous quantity leaves itself from white noise„Raw material “for the most diverse noises represent.

A noise defines itself as sound event, with which the individual frequency (on) does not divide on integral multiples of the deepest frequency (basic clay/tone/basic frequency) swings. Bell sounds of their first overtones frequently already form a special group a third, Quinte or Sixth form, 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 thatTheory of the harmony would be linkable.

Also no periodic events in the Zeitverlauf individual part (would sound) 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 also 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 comeHumming noises of the drive. 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 defined finally, also respectable. one can recognize it. AsExample is 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 already apply since experiments of the 1960er - years (Karl Heinz stick living, Pierre Schaeffer, OSCARSala, etc.) of noises and sounds as equal material. One could state something similar also over classical music (drums, basin, rammers). However and gave there are music styles those without noise bodies again and again functions, thus at Kirchenchören (jazz choirs schnippen nearly always alsoNoise) or medieval counterpoint music.

 

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