Method for detecting heart rate from acoustic signals using Q-filters [Reference1: Magdi Mohamed and Weimin Xiao, "Method and Apparatus for Digital Signal Filtering", issued by USPO as Patent No. US007117128-B2 on October 3, 2006], [Reference2: Weimin Xiao and Magdi Mohamed, "Method for Optimization of Q-Filter Kernel Parameters", filed application (US20060195499-A1, WO2006088569-A2) with the United States Patent Office on July 12, 2005], [Refernce3: Di-An Hong, Liliana Grajales, Magdi Mohamed, and Weimin Xiao, "Method for Detecting Heart Rate and Systems Thereof", filed application (US20060287606-A1) with the United States Patent Office on June 21, 2005], [Reference4: Irfan Nasir, Tom Mathew, Magdi Mohamed, Jon Schindler, and Weimin Xiao, "Hardware Arithmetic Engine for Lambda-Rule Computations", filed application (US20080104159-A1, WO2008054962-A2) with the United States Patent Office on October 31, 2006], [Reference5: Magdi Mohamed and Weimin Xiao, "Application of Q-Measure Techniques to Adaptive Nonlinear Digital Filtering", in the IEEE World Congress on Computational Intelligence (IEEE-WCCI-2006), International Conference on Fuzzy Systems (FUZZ-IEEE-2006), Vancouver, BC, Canada, July 16-21, 2006], [Reference6: Magdi Mohamed and Weimin Xiao, "Q-Filter Structures with Applications in Mobile Communication Systems", in the SPIE Defense and Security Symposium, Conference 6982 on Mobile Multimedia/Image Processing, Security, and Applications, Orlando, Florida, March 16-20, 2008].

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