More about ultrasonic (93)

1-07-2010 | Here’s a novel way of listening to bats over the Summer. Put the receiver — powered by four AA (R6) cells — on a window-ledge, for example,...

1-09-2008 | Using the circuit described here you can quickly and simply check whether harmful sounds with a high frequency are being produced somewhere...

1-09-2007 | Although bats are common animals, it is rare to actually catch a glimpse of one. In the dark they are practically invisible, and their ultra...

1-07-2007 | When designing a robot, a choice has to be made as to the types of sensors that it will have. This choice will be determined mostly by the p...

1-07-2007 | Although the simplest robots may be content to simply detecting obstacles, many robots that require precision in their positioning need to b...

1-07-2007 | To be precise, this ultrasonic distance measuring device is more than just an ear, since it generates pulses of sound at 40 kHz as well as l...

1-09-2005 | Lengths and distances are usually measured using a yardstick or measuring tape. For inaccessible locations, and especially for measuring the...

1-04-1995 | The detector makes sounds at frequencies of 10-300 kHz audible to human beings. The conversion is ca ried out either by a superheterodyne...

1-10-1988 | Octcber ULTRASONIC DISTANCE METER Until well into the twentieth century, most devices developed for measuring distance worked on the same pr...

1-09-1987 | ptember 1987 Measurements of ventricular distances by using ultrasonic techniques by Baki Koyuncu (Physics Department, Kuwait University, Ku...