THIS 22.1
Standard FIR Filter Option
Standard FIR filter option
The FIR filter (Finite Impulse Response) is specified by NHTSA. It is used for filtering thoracic accelerations from side impact dummies; the filtered accelerations are then used in calculation of TTI (Thoracic Trauma Index). Its characteristics are:
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A passband frequency of 100Hz. |
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A stopband frequency of 189Hz. |
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A stopband gain of -50dB. |
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A passband ripple of 0.0225dB. |
It is based on a standard Fortran programme available from NHTSA.