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                 BioSignetics Corporation
                                                                    Digital Stethoscope Company                             




BSIGNAL Phonocardiograph Monitor
New Features in Version 3.7

Phonocardiograph Monitor software can be used to aid in studying and analyzing the same heart conditions that are typically studied using manual heart auscultation:
stenosis, regurgitation, splits, clicks, gallops, snaps, rumble, valve prolapse, murmurs, septal defect, patent ductus arteriosus, atrial septal defect, aortic insufficiency, artificial valves.

Release Date: Nov 1st, 2009

For Educational and Non-Clinical Research Only

To be utilized by the physicians, residents, medical students and professors (teachers), biomedical engineers and electrical engineers for heart auscultation education, training and non-clinical research 

-reads MP3 file format recordings of heart sounds, converts to windows wave format or text data format

-new set of characteristic murmur scores (patent pending) for direct quantitative heart murmur and S3/S4 characterization
            a) intensity score;   b) frequency score;  c) duration score.

 -interactive S1, S2 and murmur selection tool;

 -one button build-in Bell or Diaphragm filters. These pre-build filters save data into a new sound track;

 -can record heart sounds showing real-time running display – records using line-in input on the PC sound card or using external USB sound card (V3) . Tested with Meditron Welch Allyn, Andromed, Cardionics E-Scope stethoscopes, PADS adhered sensors and BebeSounds prenatal listener;

 -allows direct replay of recorded or stored (wave) heart sounds;

 -allows replay of any selected segment of the sound and repetitive replay mode. Automatically amplifies signal (with optional automatic filtering) for best audio performance. Achieves excellent audio quality using computer amplified sub-woofers;

 - automatic reporting feature documents findings (screen displays) in word format, allows to enter comments as necessary. Works with MS Word 2000, 2003;

 -selective amplification of specific sounds or their components – can enhance or suppress S3s, S4s, murmurs, etc. Very helpful to study audibility thresholds;

 -signal cut out tool – allows to cut out selected sound segment and save it as a new file;

 -simultaneous display of several sound tracks,  can create new or delete soundtracks. Very effective tool to demonstrate effects of sound filtration;

 -auscultation position display and report function;

 -easy heart sound scroll button with a preset scroll distance (can be set to scroll heart beat by heart beat);

 -advanced murmur and heart sound display statistics with option to save data as excel file;

 -selectable ranges for frequency display and signal amplitude display;

 -new library of service sounds and additional heart sounds;

 -new print window option;

 -allows to directly read Littmann L4000 e4k sound recordings format and to convert e4k files into wave files;

 -allows to read ‘eri’ format from Point of Care Pro-Steth stethoscope add-on device  developed by Dr. M. Tavel, Dr. H. Katz ;

 -enhanced software and license protection features, can not be copied to other computers without a license, registration and license key;

 -enhanced software installation procedure, downloadable via ftp.

 Version 2 Features

 -allows to select a portion of interest in a heart sound (murmur S1, S2, S3, S4 etc) and to instantly perform time averaged frequency analysis of this interval (sound) to precisely establish lower and upper frequency bounds and to precisely establish dominant peak frequency;

 -extracts data (entire file or portion) from the phonocardiogram into Excel or external data processors is ‘csv’ format (comma separated);

 -reads windows PCM wave files in 8kHz, 11kHz,22 and 44kHz sample rates

 -saves data (heart sound waveform) into MS Windows wave sound format;

 -allows to examine precise signal amplitude of at any given moment in time;

 -allows to examine precise averaged frequency of any waveform at any moment in time;

 -allows to precisely measure and display the heart rate for every heart beat using simple gui driven interactive method;

 -allows to precisely measure timing of murmurs, and of S1, S2, S3, S4, etc.

 -allows to precisely measure time durations between heart sounds and their components, allows to measure durations of heart sounds;

 -allows to calculate murmur intensity scores and signal amplitudes for any time interval or sound component. Intensity murmur scores can be converted to Freeman-Levin grades (1-6);

 -allows to estimate recording noise background level and allows to perform automatic noise reduction using innovative wavelet based  algorithms developed by BioSignetics;

 -allows to conduct custom filtering of heart sounds (5 various type of filters with custom parameters and cut off frequencies) and to emulate bell, and diaphragm modes;

 -allows to conduct background noise reduction with custom threshold;

 -allows to eliminate ‘shhhh’ noises using signal filtering;

 -allows to delete portions of the sound track, noises, artifacts or to just simply create shorter recordings;

 -allows to create “pauses” or to nullify selected recording segments (this way you can add or eliminate sound component and murmur and then explore the audio representation). Very effective feature for educational purposes;

 -allows to quickly and interactively zoom into the specific portion of the heart sound;

 -allows to monitor signal intensity variation with respiration and to establish respiration rate;

 -allows to monitor sound split, distance between A and P components in S2;

 -allows to amplify weakly recorded sounds for maximum audio quality and store them
as high fidelity wave audio files;

 -allows to perform DC bias adjustment on the wave sound files;

 -allows to perform sound normalization for subsequent data processing;

 -allows to down-sample sounds recorded with high sampling rates (44kHz) down to 11 kHz

 without loosing signal quality using innovative wavelet based methodology;

 -smart software remembers your settings from the previous work session;

 -allows to create special sounds (clips) for teaching and demonstration purposes

 -MP3 heart sounds can be converted into wave files using free and tested MusicMatch JukeBox software.

All Materials and Images are subject to the Copyright.
Copyright: 2004-2009 BioSignetics Corporation
Last modified: 02/02/09