
Rhythmic Auditory Stimulation System Gerard Duff 17th of April 2008
Today's agenda • Project Spec • Research • Initial Planning • MP3 Player • Stride Rate • Project Summary • Questions
Project Spec • Music Therapy is used in neurologic rehabilitation. • Studies have shown that the effects of RAS on Parkinson's disease, improves stride length and stride-to-stride variability • Design a pc based music system that will play back music in rhythm to the users ideal stride frequency.
Audio files Find a song with a suitable tempo Hard to find songs Nice to listen to Synthesized music Make up song Easy to change tempo Hard to find nice songs Research
Accelerometer: Used to detect leg movements HyperTerminal: Accelerometer used Bluetooth to connect with pc and send raw data to it. Mp3 Player: User input stride rate and audio file speed was adjusted to match the stride rate. Matlab: Interfaced with HyperTerminal, received raw data values and calculated the stride rate Initial Planning
Main Program • Chose a programming language • Three main functions • Find Stride Rate • MP3 player • Metronome player
MP3 Player • Designing GUI • Ease of use • Display key information • Basic MP3 player capabilities • Add songs • Play, stop, skip • Help Function
Original Tempo • Matlab code • Too many samples required • Mixmeister • Updates id3 tag • Fast
Changing Tempo • Media rate • Can change speed sufficiently without affecting pitch
Metronome • Provide a metronome function for testing • Time constraints on project • Gmans guitar metronome
Stride Rate • communicated with the pc via bluetooth • Interfaced using a HyperTerminal
Calibrating Accelerometer • y and z axis were deactivated • 3.6 g was a sufficient threshold
Using Matlab • Fopen,fprintf, fscanf • MatLab.Execute(“.”)
Project Summary • Overall I completed • mp3 player • metronome • Started accelerometer • Developed a system from scratch using a new language • Future work…