Hi dboots; The cochlea is the only human organism capable of responding to the pulsed electromagnetics. Thanks and take care Patty
On Apr 24, 9:02 pm, dboots <[email protected]> wrote: > Soumyajit Mandal, who designed the chip to mimic the cochlea, which > uses fluid mechanics, piezoelectrics and neural signal processing to > convert sound waves into electrical signals that are sent to the > brain. > "The cochlea quickly gets the big picture of what is going on in the > sound spectrum," said Sarpeshkar. "The more I started to look at the > ear, the more I realized it's like a super radio with 3,500 parallel > channels > > http://www.eetimes.com/news/semi/rss/showArticle.jhtml?articleID=2177... > > Researchers tout RF chip that mimics the inner ear > > John Walko > EE Times Europe > (06/04/2009 8:13 AM EDT) > > LONDON — Researchers at the Massachusetts Institute of Technology > (MIT) have developed a fast, low-power radio chip imitating the human > inner ear, or cochlea. > > The radiofrequency chip RF cochlea (in article encrytion squares > around RF cochlea) > is capable of picking up mobile phone, GPS, radio, internet and > Bluetooth signals and, the researchers suggest, could enable wireless > devices to receive cell phone, wireless Internet, FM radio and other > signals. > According to the engineers, the RF cochlea chip is faster than any > human-designed radio-frequency spectrum analyzer and also operates at > a lower power. > The MIT team was led by Rahul Sarpeshkar, associate professor of > electrical engineering and computer science, and his graduate student, > Soumyajit Mandal, who designed the chip to mimic the cochlea, which > uses fluid mechanics, piezoelectrics and neural signal processing to > convert sound waves into electrical signals that are sent to the > brain. > "The cochlea quickly gets the big picture of what is going on in the > sound spectrum," said Sarpeshkar. "The more I started to look at the > ear, the more I realized it's like a super radio with 3,500 parallel > channels." > The RF cochlea, embedded on a silicon chip measuring 1.5mm by 3mm, > detects the composition of any electromagnetic waves within its > perception range. > It'is said to consume about 100 times less power than that required > for direct digitization of the entire bandwidth, the researchers say. > They suggest this makes it desirable as a component of a cognitive > radio, which could receive a broad range of frequencies. > Sarpeshkar and his students describe the device in a paper to be > published in the June issue of the IEEE Journal of Solid-State > Circuits . They have also filed for a patent to incorporate the RF > cochlea in a software radio architecture that is designed to > efficiently process a broad spectrum of signals. > The paper notes that as sound waves enter the cochlea, they create > mechanical waves in the cochlear membrane and the fluid of the inner > ear, activating hair cells (cells that cause electrical signals to be > sent to the brain). > The cochlea can perceive a 100-fold range of frequencies -- in humans, > from 100 to 10,000 Hz. Sarpeshkar used the same design principles in > the RF cochlea to create a device that can perceive signals at million- > fold higher frequencies, which includes radio signals for most > commercial wireless applications. > This is not the first time Sarpeshkar has drawn on biology for > inspiration in designing electronic devices. His MIT group previously > developed an analogue speech-synthesis chip inspired by the human > vocal tract and an analysis-by-synthesis technique based on the vocal > tract. The chip's potential for speech recognition and voice > identification has applications in portable devices and security > applications. > He is also working on projects inspired by signal processing in cells, > and has worked on hybrid analogue-digital signal processors inspired > by neurons in the human brain. > "Humans have a long way to go before their architectures will > successfully compete with those in nature, especially in situations > where ultra-energy-efficient or ultra-low-power operation are > paramount," Sarpeshkar said. > Reference : Mandal, S.; Zhak, S. M.; Sarpeshkar, R. A Bio-Inspired > Active Radio-Frequency Silicon Cochlea. IEEE Journal of Solid-State > Circuits, 2009; 44 (6): 1814-1828 DOI: > > -- > You received this message because you are subscribed to the Google Groups > "Hum Sufferers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/hum-sufferers?hl=en. -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hum-sufferers?hl=en.
