144

Appendix B

Response time (F,S, I)

Selectable time response settings used in SoundPro SE/DL measurements. The response time is a standardized exponential time weighting of the input signal according to fast (F), slow (S) or impulse (I) time response relationships. Time response can be described with a time constant. The time constants for fast, slow and impulse responses are 0.125 s, 1.0 s and 35 ms, respectively. Impulse time response is 35ms rise with a constant decay of 2.9dB/sec.

Relative response (dB)

Burst duration, t (seconds)

Figure B-2:Slow response to a tone burst

Relative response (dB)

Burst duration, t (milliseconds)

Figure B-3:Fast response to a tone burst

Models SE and DL

Page 157
Image 157
3M DL, SE user manual Response time F,S, Relative response dB Burst duration, t seconds