CONTROL SONORO

http://en.wikipedia.org/wiki/Brown_note
http://en.wikipedia.org/wiki/Brownian_noise

The brown note, according to an urban legend, is an infrasound frequency that causes humans to lose control of their bowels due to resonance. There is no scientific evidence to support the claim that a “brown note” (transmitted through sound waves in air) exists.
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La “nota marrón” es una nota musical comprendida entre los 4 Hz y los 10 Hz. Es un infrasonido que produce efecto laxante en la mayoría de las personas.

Physiological effects of low frequency vibration (from Wikipedia)

Jürgen Altmann of the University of Dortmund, an expert on sonic weapons, says that there is no reliable evidence for nausea and vomiting caused by infrasound.

Loud concert levels of subwoofer arrays have been cited as causing lung collapse in individuals who are very close to the subwoofer, especially for smokers who are particularly tall and thin.[4]

Air is a very inefficient medium for transferring low frequency vibration from a transducer to the human body.[5] Mechanical connection of the vibration source to the human body, however, provides a potentially dangerous combination. The U.S. space program, worried about the harmful effects of rocket flight on astronauts, ordered vibration tests that used cockpit seats mounted on vibration tables to transfer ‘brown note’ and other frequencies directly to the human subjects. Very high power levels of 160 dB were achieved at frequencies of 2-3 Hz. Test frequencies ranged from 0.5 Hz to 40 Hz. Test subjects suffered motor ataxia, nausea, visual disturbance, degraded task performance and difficulties in communication. These tests are assumed by researchers to be the nucleus of the current urban myth. [6] Similar effects were observed during the brief flight testing of the XF-84H Thunderscreech turboprop-powered fighter aircraft. The physiological effects of being nearby and buffeted by repeated sonic booms while the engine was being run were numerous and included loosening of the bowels, along with a grab-bag of other symptoms including nausea and even epileptic seizures in non-epileptic individuals.
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Efectos psicológicos de las bajas frecuencias de sonido

Jürgen Altmann, de la Universidad de Dortmund, experto en armas sónicas, comenta que no hay pruebas fiables que demuestren que los infrasonidos puedan causar náuseas y los vómitos.

En algunos conciertos con niveles de frecuencias graves muy altas se han registrado casos de colapso pulmonar en personas cercanas al subwoofer, sobre todo en fumadores de talla alta y complexión delgada.

Air is a very inefficient medium for transferring low frequency vibration from a transducer to the human body. [5] Mechanical connection of the vibration source to the human body, however, provides a potentially dangerous combination. El aire es un medio muy poco eficaz para la transmisión de vibraciones de baja frecuencia, como si lo es el cuerpo humano. The US space program, worried about the harmful effects of rocket flight on astronauts, ordered vibration tests that used cockpit seats mounted on vibration tables to transfer ‘brown note’ and other frequencies directly to the human subjects. El programa espacial los EE.UU., preocupados por los efectos nocivos de los astronautas en el vuelo de cohetes, ordenó pruebas de vibración […] para comprobar los efectos de las frecuencias bajas. Se probaron frecuencias de 2-3 hz a muy alto nivel de potencia (160db), y otros ensayos con rangos de frecuencia mayores […] se comprobó que algunos sujetos sufrieron motor ataxia, náuseas, trastornos visuales, degradación del rendimiento de trabajo o dificultades en la comunicación. […] se observaron efectos similares durante un breve vuelo de pruebas del XF-84H Thunderscreech, avión de combate. Los efectos fisiológicos, al estar cerca del motor, incluyeron relajación de intestinos, náuseas e incluso ataques de epilepsia en personas que no lo son.

EXTRACTOS DE VIDEO:

MYTHBUSTERS
The Brown Note
http://www.meyersound.com.au/brownnote.shtm

Another show, Brainiac: Science Abuse, claimed to have performed an experiment using 22.275 Hz at −30 dB (according to the show’s producers used by Japan’s police and tested by the French military). During the program, they broadcast the note over the air (and into the living rooms of viewers) in an attempt to cause bowel movements among those who had chosen to stay in the room despite repeated warnings and opportunities to leave. […] They also alleged to have confirmed the myth with a subject, but this subject was out of camera shot for all of the piece except at the very beginning. The Brainiac: Science Abuse experiment can not be considered reliable as the show itself is often criticized for its scientific inaccuracies, and producing pseudo-scientific experiments solely for entertainment purposes.

In 2003, a team of researchers held a mass experiment where they exposed around 700 people to music laced with 17.5 Hz sine waves, produced by an extra-long stroke subwoofer mounted in the end of a sewer pipe. The experiment took place in the Purcell Room, London. The team was warned against the experiment by physicists (and a person in the local hi-fi store) who were concerned the audience would have to evacuate their bowels in the concert — but in this double-blind test of the effects of airborne infrasound, the team reported none of the legendary effects. There were many reports of anxiety in the audience — and of feelings of pressure on the chest.

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SOUTH PARK
Concierto Mundial de Flauta

Capítulo 317 de esta serie de animación que se acerca al mito de la Nota Marrón con el humor al que nos tienen acostumbrados. Los protagonistas de este concierto mundial son Kenny G. (saxofonista) y Yoko Ono.