Abstract: This invention is an improved medical device for non-invasive counterpulsation treatment of heart disease and circulatory disorder through external cardiac assistance. The device is comprised of cuffs which are affixed on a patient's lower body and extremities, and which constrict by electromechanical activation, thereby augmenting blood pressure for treatment purposes. Cuffs contain preferably fixed volume fluids such as gel, air, or water. Cuffs wrap around and are affixed to the patient's lower body and limbs. Computer or electronic means automatically correlate constriction of electromechanical actuators in the cuffs variably with the patient's measured physiological indicators, including diastolic and systolic heart functions, thereby augmenting blood pressure and optimizing benefit of counterpulsation treatment.

Abstract: A new long bit hole saw arbor for allowing a user to drill a hole in a material using readily available EMT conduit as a cutting saw member. The inventive device includes an arbor member, an attachment shank extending from the arbor member to permit mounting of the invention to a power tool, a saw member inserted into the arbor member, and a chuck member and a drill bit extending from the arbor member through the saw member.

Abstract: Audio signals are digitized and an FFT is conducted on samples of the digitized signals to produce corresponding frequency spectrums. These spectrums are analyzed, such as by determining one or more peak frequency magnitudes which are 33 dB greater than harmonics or subharmonics of the frequency in a plurality of several successive spectrums, to detect resonating feedback frequencies. The offending frequency is then filtered in the time domain, either in the digitized form or analog form, to eliminate the feedback.