Joint Vibration Analysis is based on simple principles of motion and friction: When smooth surfaces rub together, little friction is created...and little vibration. If these surfaces become rough, then friction and vibration are created when these surfaces articulate. Human joints have surfaces which rub together in function. Smooth, well lubricated surfaces in a proper biomechanical relationship produce little friction and little vibration. But surface changes, such as those caused by degeneration, tears, or displacements of the disk, generally produce friction and vibration. Different disorders...

Joint Vibration Analysis Performance Specifications JVA System Bandpass: JVA System Frequency Resolution: Maximum (unlimited) input amplitude: JVA System input amplitude resolution: Total Integral Range: (Amplitude multiplied times fequency) 0.15 Pascal (12 bit PCMCIA/PCI A/D) 0.0 to 1000 PaHz (Pascal-Hertz) Amplitude x Frequency Integral Resolution: Time of a single recording: 0.1 PaHz 10 seconds < T < 3.0 minutes (180 seconds) Time resolution ( 2,000 samples/sec): > 300 Hz / < 300 Hz (Ratio) Frequency Means (Increments) Common mode Rejection Ratio Format for FFT / Wavelet display 0.5 millisecond...