Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Patent
1994-09-26
1996-11-19
Kuntz, Curtis
Electrical audio signal processing systems and devices
Monitoring/measuring of audio devices
Loudspeaker operation
381 55, 381 96, 381 98, 381106, 381107, 381108, 330279, 330129, 330278, H04R 2900
Patent
active
055771262
ABSTRACT:
This invention relates to an arrangement (1) for protecting transducer (3) which converts an electric signal into an acoustic or a mechanic signal against overload and destruction. The arrangement is connected to the electric terminals of the transducer (3) and changes the electric input signal under overload condition. A reference filter (6) connected with the electric input of the transducer provides a monitored signal x(t) related to the load of the transducer (3) to a controller (7). If the amplitude of the monitored signal x(t) exceeds an prescribed threshold value the controller (7) activates a feedback loop realized by the reference filter (6), multiplier (8) and summer (5). This invention provides an effective protection of the transducer with a minimum of elements by using the reference filter (6) as both a signal detector and a controlled attenuation element. Because the activated protection system has approximately the inverse transfer response of the reference filter the spectral components with the highest amplitude in x(t) are attenuated primarily.
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Klippel, W.: The Mirror filter-a New Basis for Reducing Nonlinear Distortion Reduction and Equalizing Response in Woofer Systems, J. Audio Eng. Soc. 32 (9), pp. 675-691, (1992).
Kuntz Curtis
Oh Minsun
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