[Measurement technique for the cracking sounds during spinal manipulation].
OBJECTIVE
To design a set of equipment to collect, locate and analyze the cracking sounds during spinal manipulation.


METHODS
On the basis of reviewing the current techniques for cracking sound measurement, we designed a cracking measurement system consisting of a pulse generator, transmission/reception interface, calibrating wave generator, compound sensors, computer, analytical software, and output components.


RESULTS
Preliminary experiments demonstrated that the cracking sounds could be detected at a distance of 40 cm, suggesting that this system was technically feasible with some improvements to be made.


CONCLUSIONS
This device can be used for collecting, locating and analyzing the cracking sounds during spinal manipulation.
Li
Yi-Kai
YK
Department of Traditional Chinese Orthopedics and Traumatology, Southern Medical University, Guangzhou 510515, China.
Chen
Jian-Hua
JH
Qiu
Gui-Chun
GC
D004867:Equipment Design; D006801:Humans; D020393:Manipulation, Spinal / Q000295:instrumentation*; D013016:Sound; D013018:Sound Spectrography / Q000295:instrumentation* / Q000379:methods