Auscultation sound spectrum analysis-based multifunctional digital stethoscope circuit

Abstract

The invention relates to an auscultation sound spectrum analysis-based multifunctional digital stethoscope circuit. A CMOS (complementary metal-oxide-semiconductor transistor) technology-based silicon microphone sensor is arranged in a stethoscope; the sensor can convert various sounds generated by organs of a human body into corresponding level signals; the level signals are subjected to operation amplification, filter anti-aliasing, and analog-to-digital conversion, and then are transmitted into an application specific integrated circuit (ASIC) for digital signal processing, wherein a digital signal processing part is characterized by comprising an FIR (finite impulse response) filter unit, a system master control unit, an FFT (fast Fourier transform) operation unit, a spectrum screening core operation unit, a data communication unit and other logic units for spectrums of different organs of the human body; through an earphone interface, a universal asynchronous receiver / transmitter(UART) or variable-gain amplifier (VGA), a doctor can listen to the sound frequency through an earphone, or performs auscultation by displaying the spectrums through the connected display, and diagnosis results can be conveniently recorded, evaluated and saved; meanwhile, by combining technology of Internet of things, digital medical treatment solutions such as remote auscultation at home, remotemultilateral consultation and establishment of a civil human organ sound frequency spectrum library are constructed.

Description

technical field [0001] The invention relates to a multifunctional digital stethoscope circuit based on auscultation audio spectrum analysis, which belongs to the field of digital medical equipment and equipment systems. Background technique [0002] Since the French physician Linnaike invented the stethoscope in 1816, it has been an important testing device for modern medical diagnosis and treatment in the past nearly 200 years. The image of a doctor with a stethoscope appears in various media materials such as manuals, advertisements, and pictorials, and has become the most popular cultural symbol representing medicine, medical care, and doctors. Learning to use a stethoscope and using it to assist in the diagnosis of diseases such as bronchitis, pneumonia, and pleural effusion was once an important compulsory skill for medical students. However, with the advancement of medical technology, doctors now pay less and less attention to this traditional medical device. Even i...

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Problems solved by technology

On the other hand, many patients are gradually relying on relatively complex detection methods such as CT, B-ultrasound, electrocardiogram, blood test, X-ray fluoroscopy, etc., for fear that less inspection will lead to deviations in diagnosis

However, in fact, people in the medical profession also believe that, except for some serious diseases or difficult miscellaneous diseases, most diseases do not need to use expensive and time-consuming large-scale equipment such as CT and MRI.

[0004] Another very important reason for not paying attention to the traditional stethoscope is that it cannot generate detailed and scientific data reports. Doctors are not sure what to hear based on experience, and patients cannot see specific data reports. Both doctors and patients gradually accept this view. The seemingly simple auscultation is skeptical, and finally resorted to CT, MRI and other means. The doctor is "relaxed" and the patient is "rest assured". After all, most people always think that "seeing is believing" and "expensive machines are not too fallible"

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