Biological Effects of High Frequency Sound

“…results suggest the existence of a previously unrecognized response to complex sound containing particular types of high frequencies above the audible range. We term this phenomenon the ‘hypersonic effect.” May explain why most listeners can hear a supposedly impossibly high-frequency difference between a 12 kilo Hertz square wave versus a 12 kilo Hertz sine wave. … Read more

A Nonlinear History of Radio

This highly nonlinear history of radio touches briefly on just some of the main stories, and provides pointers to the literature for those who want to probe further. Integrated circuit engineers have the luxury of taking for granted that the incremental cost of a transistor is essentially zero, and this has led to the high-device-count … Read more