Wednesday, June 9, 2010

Physiology and pathology of taser electronic control devices

By Mark W. Kroll, the man that keeps forgetting his Fourier (EE101).

Tasers "...are small, battery powered, handheld devices. They deliver short duration, low energy pulses to stimulate motor neurons, causing transient paralysis." [LINK]

Mark, Mark, Mark... tsk tsk tsk...

How many times do I have to explain this to you?

The X26 taser, as distinct from the older M26 taser, has a waveform with a distinct DC pulse after the arc phase. Although appearing to be small in peak height, it changes everything. This pulse is DC offset and *is* 19 Hz (and harmonics) low frequency.

It is THUS not a short duration.

The X26 waveform has significant low frequency spectral components that are continuous 100% duty cycle for as long as the trigger is held down.

THERE'S NO SUCH THING AS 100 MICROSECONDS OF 19 Hz!!

This is a cold hard fact.

It also explains why even Taser International allows that the safety margin is larger with the older M26 taser, in spite of the self-evident ratio of peak output.

If your analysis is demonstrably incorrect in the 2nd sentence of the Abstract, then what other flaws exist in your 'logic' that you apply to "prove" that tasers are cardiac-safe?

It would be a funny error except that your assurances of safety lead directly to overuse, and probably misuse, of tasers (abuse may be a separate issue, but you're not helping there either). These false assurances of safety are therefore increasing the risk of death of ordinary citizens.

Bad.

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