Thinklabs DS 32 a Patent No US 6

Thinklabs DS 32 a – Patent No. : US 6, 498, 854 B 1 Simulation Presentation: Obviousnes Patent No. 6498854

Patent ‘ 854, Claim 13 • An electronic stethoscope including an acoustic-to-electrical transducer for detecting body sounds, the transducer comprising: – a stethoscope diaphragm having an electrically conductive surface, the diaphragm being mounted in a stethoscope chestpiece such that the diaphragm can contact the body for body sound detection and vibrate in response to body sounds; – a fixed conductive plate substantially parallel to the diaphragm, mounted within the chestpiece, the conductive plate being positioned at a distance about or exceeding 0. 5 mm from the diaphragm, the diaphragm conductive surface and fixed conductive plate forming two plates of a capacitor and connected in the form of an electrical capacitance to electrical circuitry; – a capacitance-to-electrical signal conversion means to convert diaphragm-plate capacitance changes due to body sound vibrations to electrical signals; – the stethoscope further comprising signal amplification means and at least one electrical-to-acoustic transducer connected to signal amplification means, to reproduce body sounds as detected by said transducer. Simulation Presentation: Obviousnes Patent No. 6498854

Patent ‘ 854, Claim 13 a stethoscope diaphragm having an electrically conductive surface, the diaphragm being mounted in a stethoscope chestpiece such that the diaphragm can contact the body Electric Field for Electrically Conductive Surface of body sound detection Movable, Flexible Diaphragm and vibrate in response to body sounds; Electrically Conductive Plate Simulation Presentation: Obviousnes Patent No. 6498854 Attachment Means to Mount to Housing

Traditional acoustic stethoscope ear pieces chest piece tubing Simulation Presentation: Obviousnes Patent No. 6498854

Microphone based stethoscope Acoustic to electronic signal US Pat. No. 6002777 Insulation layer Simulation Presentation: Obviousnes Patent No. 6498854

Piezoelectric stethoscope × non-linear conversion × × distortion different tones Simulation Presentation: Obviousnes Patent No. 6498854

What is a capacitor? 1/8/2022 Simulation Presentation: Obviousnes Patent No. 6498854 7

Prior art: capacitive microphone Simulation Presentation: Obviousnes Patent No. 6498854

Prior art: microphone 400 V ! Simulation Presentation: Obviousnes Patent No. 6498854

Thinklabs DS 32 a Acoustic to electronic signal Benefit of the single diaphragm ü Reduction of noise ü Protection from electronic shock ü Lower manufacturing cost Simulation Presentation: Obviousnes Patent No. 6498854

Tactile sensor Finger Flexible, Insulating Layer “X-Y Matrix” X-trace Y-trace ü Physical touch vs acoustic wave ü Different intensity of signal ü Different frequency range Simulation Presentation: Obviousnes Patent No. 6498854 vs

Microphone + Tactile sensor = ? + = NO! Simulation Presentation: Obviousnes Patent No. 6498854