fdojose

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  • Género Male
  • Ubicación: Santiago, Chile
  • Intereses Música, Audio, Arte, Motos, Informática, Acupuntura, la vida.

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1.613 visitas al perfil
  1. Te permite bi-amplificar o separar a nivel de pre o power las frecuencias altas-medias/bajas o altas-medias-bajas según el caso. Mi primer equipo fue un cambridge que tenia salidas A/B con unos Bronze 2, cuando los conecte separadosel sonido cambió bastante. De ahi los siguientes solo han tenido 1 salida y los parlantes 1 entrada, así que no seguí con las pruebas. Saludos, Enviado desde mi iPad utilizando Tapatalk
  2. Mizushima 300 B. 8 Watts SE. Clase A.

    Hola @trekky, podríamos hacer una junta en mi casa para escucharlo con los Orangutan O/93. La otra vez escuchamos el 300b de @Patagonia y sonaba linnnndoooooo. (Y no es porque lleve 3 semanas en la casa con la pata arriba sólo saliendo para kine ) Saludos,
  3. ¿Parlante inalámbrico o sistema completo?

    Justo estaba considerando uno para la of, podrías hacer un review del Muso? Igual es carito y hay que pensarlo bien. Gracias, Enviado desde mi iPad utilizando Tapatalk
  4. Problemas y desventuras con Shiit

    Puedes usar un "elmina pilas" de la Casa Royal o el Home Center, yo le puse uno ajustable y con un tester me aseguré que diera los 12V. Saludos, Enviado desde mi SM-G930F mediante Tapatalk
  5. El Crsito de Elqui en streamig - AHORA

    http://on.mediastre.am/municipal Se ve y suena bien!! Enviado desde mi SM-G930F mediante Tapatalk
  6. Eso si no se me había ocurrido, con agua tónica, habrá que probarlo. Enviado desde mi SM-G930F mediante Tapatalk
  7. Yo me declaro hincha del Araucano, no como tónico ni nada similar, sino porque es rico y ha Ahora mi cuñada nos introdujo en el vicio de la Ratafia que es la versión catalana del Araucano, un poco más anizado y menos amargo. El problema es que dura poco ;) Enviado desde mi SM-G930F mediante Tapatalk
  8. Sonus Faber Concerto Domus

    Yo las tuve un rato, las cambié porque tienen un tremendo bajo y estando en un 2do piso hacían retumbar toda la casa (bajan hasta los 30 hz) Son un poco obscuras, pero dulces, por lo que sugiero una electrónica con harta definición o más “brillante”, usando el Cambrigde 851C como fuente sonaban muy bien. Como decía más arriba, tienen un tremendo bajo (lo extraño) y roquean de lo lindo, hay que ponerle volumen para apreciarlas, pero son de 4 ohms y el Leben (15 W) las movía del lujo. Son muy lindas, se ven y se sienten solidas. Las disfruté cuando la eñora me dejaba. Pensé que le durarían más a Fabrizio ;)
  9. ¡Adelantamos los CYBER DAYS MAYO 2018!

    Pucha, nadie está libre de caer, lo importante es poder levantarse, tengo la mejor impresión de ellos, ojalá salgan adelante. Gracias,
  10. Subwoofer para amplificador stereo

    Hola, yo tengo un Monitor Audio, 250 Watts y raramente lo pongo más allá de las 12. El crossover lo menejo al mínimo, 45 Hz, y lo alimento desde el dac que uso como preamp. Solo extraño que no tiene control remoto y si se quiere poner más power hay que levantarse y ajustarlo. Saludos, Enviado desde mi iPad utilizando Tapatalk
  11. Rotura de tendón de aquiles...

    Hola, mejor de lo que esperaba, no me ha dolido tanto, dejé los analgésicos hace 3 días, ya me estoy desplazando con las muletas y el próximo martes empiezo con la kine. Muchas gracias, Enviado desde mi SM-G930F mediante Tapatalk
  12. A mi también me llamó la atención eso, y lo que dice respecto a que podemos distinguir sonidos con una separación de 0.1% y las teclas del piano tienen 6%. Como todo en nuestro cuerpo el sistema auditivo es una maravilla, debemos apreciarlo y tratarlo con cariño. Enviado desde mi iPad utilizando Tapatalk
  13. Naim Muso

    Hola, ¿lo tienes aún?
  14. Parlantes Kef q300 con problemas

    Pareciera rollo de ganancia, a lo meor el preamp o el phono guatean. Solo una idea. Enviado desde mi SM-G930F mediante Tapatalk
  15. Estimados, les dejo un interesante artículo sobre el proceso de audición: https://www.scientificamerican.com/article/theres-an-inverse-piano-in-your-head/ NEUROSCIENCE There’s an “Inverse Piano” in Your Head A Kavli Prize–winning scientist details the magic of transforming vibrations into sound in the inner ear By David Noonan on June 4, 2018 Color-enhanced scanning electron micrograph of the inside of a guinea pig inner ear showing the hearing organ, or cochlea. Running along the spiral structure are rows of sensory cells that respond to different frequencies of sound. The whole organ is just a few millimeters long. Credit: Dr. David Furness Wellcome Collection ADVERTISEMENT Neuroscientist James Hudspeth has basically been living inside the human ear for close to 50 years. In that time Hudspeth, head of the Laboratory of Sensory Neuroscience at The Rockefeller University, has dramatically advanced scientists’ understanding of how the ear and brain work together to process sound. Last week his decades of groundbreaking research were recognized by the Norwegian Academy of Science, which awarded him the million-dollar Kavli Prize in Neuroscience. Hudspeth shared the prize with two other hearing researchers: Robert Fettiplace from the University of Wisconsin–Madison and Christine Petit from the Pasteur Institute in Paris. ADVERTISEMENT As Hudspeth explored the neural mechanisms of hearing over the years, he developed a special appreciation for the intricate anatomy of the inner ear—an appreciation that transcends the laboratory. “I think we as scientists tend to underemphasize the aesthetic aspect of science,” he says. “Yes, science is the disinterested investigation into the nature of things. But it is more like art than not. It’s something that one does for the beauty of it, and in the hope of understanding what has heretofore been hidden. Here’s something incredibly beautiful, like the inner ear, performing a really remarkable function. How can that be? How does it do it?” After learning of his Kavli Prize on Thursday, Hudspeth spoke with Scientific American about his work and how the brain transforms physical vibration into the experience of a symphony. [An edited transcript of the interview follows.] Neuroscientist James Hudspeth. Credit: Zach Veilleux The Rockefeller University How does the inner ear process sound? In the 19th century there was one really important physiological insight from the German scientist Hermann von Hemholtz that endures today. He recognized that the cochlea—the receptive organ of the ear—is, in essence, an inverse piano. In the piano, each of the strings represents a single tone and the output is stirred together into a harmonious whole. The ear basically undoes that work. It takes the harmonious whole, separates out the individual tones and represents each of them at a different position along the spiral cochlea. Each of the 16,000 hair cells that line the cochlea is a receptor that responds to a specific frequency. And those hair cells are in a systematic order, just as the piano strings are. “Transduction” is a word that comes up frequently in your work. What is its role in hearing? ADVERTISEMENT The common currency of the nervous system is electrical. It is action potentials—streams of 1’s and 0’s, in effect—much like those in a computer. But the currency of the external sensory world is very different. We have photons—that is sight. We have pressure—that is touch. We have molecules—that is smell or taste. And finally we have vibrations in the air—that is the essence of sound. Each of those different types of physical stimulus must somehow be converted into the electrical signals that the brain is then capable of interpreting. That’s the transduction process. The thing that motivated me, and took the first 20 years of my 40-year career to really understand, is how that is accomplished. How the mechanical vibration, as it strikes the upper part of the hair cell—the so-called hair bundle—how that energy is converted into an electrical response. What about the other 20 years? The second half of my career was unexpected. It became apparent—from a number of lines of study by myself and others during the first 20 years—that the system was not just a passive transducer. The sound going in didn’t simply evoke a response. Instead, the ear has a so-called active process. The ear has a built-in amplifier, and that amplifier is unlike any of our other senses. It would be as if light going into the eye produced more light inside the eye, or smell going into the nose produced more smell molecules. In the case of our ears, the sound that goes into the ear is actually mechanically amplified by the ear, and the amplification is between 100- and 1,000-fold. It’s quite profound. And the active process also sharpens the tuning of hearing, so that we can distinguish frequencies that are only about 0.1 percent apart. By comparison, two keys on a piano are 6 percent apart. Is amplification the current focus of your research? It’s one of three specific things my group is investing a lot of effort in. One of the others is trying to understand how the hair bundle—the mechanically sensitive upper part of the hair cell—is assembled. It’s a real problem in developmental biology how you put something that complicated together. And another is the attempt to help regenerate hair cells. One of the biggest challenges in the field is that hair cells in mammals are not replaced when they die. That is why all of us tend to get progressively harder and harder of hearing, and eventually significantly deaf. One of the approaches we’re taking is to screen drugs to try to find a molecule that will allow hair cells to begin to regenerate again. We’ve screened 80,000 drugs so far and we have two compounds in particular that look promising. We’re now trying to learn in more detail how they operate, and whether they or related compounds could be used for regeneration in humans. ADVERTISEMENT Do you see gene therapy as a potentially viable treatment for hearing loss? I think hair cells are a very reasonable target for gene therapy—for a couple of reasons: First, there are a lot of different human hearing-loss conditions. There are approximately 100 that affect only hearing or hearing and balance, and about another 200 in which hearing loss accompanies a condition that affects the heart, the kidneys or other organs. So, particularly for the problems that are confined to the ear, gene therapy might be valuable. One of the people I shared this award with, Christine Petit from the Pasteur Institute in Paris, has really pioneered the genetic approach to identifying genes and proteins involved in the operation of human hearing. So we now have a repertoire of several dozen well-understood proteins, or genes that encode them, that are deficient in some forms of hearing loss and would be attractive targets for gene therapy. The other thing that makes the ear particularly attractive is its geometry. Right now gene therapy usually means inserting genes by means of virus. And that can be problematic when you are talking about the entire body, because you may not want some of these genes to go places where they are not ordinarily operative. But the ear is what’s called a privileged compartment; it has spaces in it where the liquids are cut off from any other liquids in the body. And there is a potential to inject a gene-carrying virus there that will only be seen by the cells of the inner ear, and will not go to the liver or other organs and possibly cause harm. Rights & Permissions ABOUT THE AUTHOR(S) David Noonan David Noonan is a freelance writer specializing in science and medicine. ☺ 2018 SCIENTIFIC AMERICAN, A DIVISION OF NATURE AMERICA, INC. ALL RIGHTS RESERVED. Enviado desde mi SM-G930F mediante Tapatalk