Sonic weapons were, in fact, used against G20 protesters in Pittsburgh, PA. As reported in the New York Times article “Protesters are met by tear gas at G20 conference”:
“The police fired a sound cannon that emitted shrill beeps, causing demonstrators to cover their ears and back up… City officials said they believed it was the first time the sound cannon had been used publicly. ‘Other law enforcement agencies will be watching to see how it was used,’ said Nate Harper, the Pittsburgh police bureau chief. ‘It served its purpose well.’”
The debate over the use and impact of sound will surely be fueled by this event. Stay tuned.
In this video you can hear the sound cannon, however it is unclear how far away it is and the decibel level.
Airs tonight! Check it out and let me know what you think, especially about the question “What is music” which was a question I had for Dr. Levitin at a talk he gave in DC years ago and led us to correspond on the subject. Also, cellist Yo-Yo Ma will be playing!
Article: PBS Announces The Music Instinct: Science and Song
Wednesday, June 24, 2009 9:00-11:00 p.m. ET
There will be a Flamenco Show with live cello music (by Heather), dancing, puppets and more tomorrow night at the Casa de la Cultura.
Flamenco show – “Tabula Rasa”
Saturday, March 14
8pm
Casa de la Cultura
Avenida Yaxchilan
$80 MXP
Also there will be another performance on March 27th, at 6pm, also at
the Casa de la Cultura.
———————–
DIA DEL FLAMENCO Y LA AMISTAD
“Yo soy yo y mi circunstancia” reza el dicho, pero dicen también que
hay muchos yoes que están en la misma circunstancia, la experiencia
creadora de cada individuo es indispensable, y sobre todo lo que
decida hacer con esa experiencia.
El ser y hacer se conjugan en Tabula Rasa (que es lo mismo que decir
TABLA LIMPIA). Quién soy, de dónde vengo y hacia dónde voy, de qué me
sirve esto que la vida me dejo, ¿y si de pronto cierro los ojos, borro
todo y empiezo de nuevo? Recomenzar desde la nada, desde un sueño,
hacerlo crecer con pasión e imaginación, únicas herramientas con las
que cuenta un artista. Palpar y sentirlo vivo, compartirlo y… dejarlo
ir, sólo para volver a comenzar de nuevo, esa, es la audacia del
creador.
Tabula Rasa, es toda una experiencia, donde la creatividad del artista
se pone de manifiesto. No es sólo danza, no es sólo poesía (selección
de textos de Xavier Villaurrutia), no es sólo marionetas… es un
momento en el tiempo, donde nos permitimos experimentar, compartir y
departir; un momento que al final sólo será el punto de partida para
crear otros sueños, otras sonrisas, otras lágrimas y ¿por qué no? Otra
vida… Después de todo, somos creadores, ¿qué otra cosa podemos hacer?
Seaing is believing. Seeing, and hearing, for yourself the amazing life, colors, and dynamics of the ocean environment is invaluable. Divers invariably have a greater appreciation of the underwater world after experiencing it first hand. Not only do you get to see things you don’t normally see walking on the shore or even snorkeling, but you experience the alien deep water environment, with the changes in pressure, currents, and changes in light and sound. Different locations seem like different worlds – even the same location at a different time of day is completely different. Some organisms are active during the day, some at night, some at twilight or dawn.
So dive in and experience the ocean world for yourself. Just make sure to get the proper training, and always go fully informed, with the proper equipment, and a buddy you trust.

Heather Spence, Marine Biologist, night diving in Puerto Morelos. (Photo Credit: Hitamar Palma Munoz)
Diving at night reveals a different world. Animals such as snapping shrimp are more active at night. Turn off the light and note the natural lights and sounds around you.
On Tuesday, Patricia Santos (CONANP), Hitamar Palma Muñoz (CONANP), David Delaney (McGill Univ), and I, went for an evening dive in Puerto Morelos, looking – and listening – for snapping shrimp. We found a handful of Alpheus armatus, and here are the photos to prove it, thanks to Hitamar (Guardaparque, Parque Nacional Arrecife de Puerto Morelos)!
This species is distinctively bright red, as you can see.
They are very little, but make quite a racket.
Great snap.
The shrimps are found hiding in curly sea anemones, with which they have a symbiotic relationship.
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