Related Experiment Video
Updated: Feb 10, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Demonstration of a Speckle Based Sensing with Pulse-Doppler Radar for Vibration Detection
Nisan Ozana1, Reuven Bauer2,3, Koby Ashkenazy4
1Faculty of Engineering and the Nano Technology Center, Bar-Ilan University, Ramat-Gan 52900, Israel. nisan.uzana@biu.ac.il.
Abstract:
In previous works, an optical technique for extraction and separation of remote static vibrations has been demonstrated. In this paper, we will describe an approach in which RF speckle movement is used to extract remote vibrations of a static target. The use of conventional radar Doppler methods is not suitable for detecting vibrations of static targets. In addition, the speckle method has an important advantage, in that it is able to detect vibrations at far greater distances than what is normally detected in classical optical methods. The experiment described in this paper was done using a motorized vehicle, which engine was turned on and off. The results showed that the system was able to distinguish between the different engine states, and in addition, was able to determine the vibration frequency of the engine. The first step towards real time detection of human vital signs using RF speckle patterns is presented.
Related Concept Videos
Doppler Effect - I
Doppler Effect - II
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Vibrating Concrete
Pulse
The pulse serves as a clinical...
Pulse
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...

