Active Countersound System with Special Arrangement of the Secondary Actuators for Reducing the Passage of Sound at an Open Boundary Area of Two Volumes; Active Countersound Arrangement; Method for Actively Reducing Sound

Abstract

An active countersound system for actively reducing the sound waves of primary sound waves, with a regulator unit, an error sensor, a reference sensor and several secondary actuators. The secondary actuators are designed to emit countersound waves, wherein the regulator unit, which is coupled to the secondary actuators, processes an error signal and a reference signal, and generates a secondary signal, which by way of the coupling is conveyed to the secondary actuators in order to control the secondary actuators by means of the secondary signal such that said secondary actuators generate countersound waves that reduce the error signal so that optimal sound wave abatement is implemented, wherein the secondary actuators are arranged such that they are located on the margin of an open passage area, which passage area comprises a margin and is to be penetrated by the primary sound waves, in order to ensure active sound wave abatement of the open space that in the direction of passage is arranged behind the open passage area, of the countersound waves in the manner of a curtain.

1 . An active countersound system for actively reducing the sound waves of at least one primary sound wave emanating from a primary actuator that emits primary sound waves,
 with at least one regulator unit;   with at least one error sensor;   with at least one reference sensor;   with several secondary actuators;   wherein the secondary actuators are designed to emit countersound waves;   wherein the error sensor, which is coupled to the regulator unit, acquires the superimposed sound waves, which are conveyed as an error signal to the regulator unit by way of the coupling;   wherein the reference sensor, which is coupled to the regulator unit, acquires the primary sound wave, of which there is at least one, which is conveyed to the regulator unit by way of the coupling;   wherein the reference sensor and the error sensor are designed so as to be integrated in one sensor;   wherein the regulator unit, which is coupled to the secondary actuators, processes the error signal and the reference signal, and generates a secondary signal, which is conveyed to the secondary actuators by way of the coupling in order to control the secondary actuators, depending on the error signal, by means of the secondary signal such that said secondary actuators generate countersound waves that reduce the error signal so that optimum sound wave abatement is implemented;   wherein the secondary actuators are arranged such that they are located on the margin of a passage area that is at least partly open, which passage area comprises a margin and is to be penetrated by the primary sound waves, in order to ensure active sound wave abatement of at least part of the space arranged behind the open passage area, which space is at least partly open, of the countersound waves in the manner of a curtain.   
     
     
         2 . The active countersound system of  claim 1 , in which the secondary actuators are equidistant along the margin of the open passage area. 
     
     
         3 . The active countersound system of  claim 1 , in which the number of secondary actuators has been selected depending on parameters such as the geometry of the space to be shielded, geometry of the open passage areas, spectral composition of the primary sound wave(s), amplitude and/or frequency of the primary sound wave(s), degree of the desired sound wave abatement. 
     
     
         4 . The active countersound system  claim 1 , in which the type of secondary actuators has been selected depending on parameters such as the geometry of the space to be shielded, geometry of the open passage area, spectral composition of the primary sound wave(s), amplitude and/or frequency of the primary sound wave(s), degree of the desired sound wave abatement. 
     
     
         5 . The active countersound system  claim 1 , in which several error sensors are in place, wherein the number and/or the positioning of the error sensors have/has been selected depending on parameters such as the geometry of the space to be shielded, geometry of the open passage area, spectral composition of the primary sound wave(s), amplitude and/or frequency of the primary sound wave(s), degree of the desired sound wave abatement. 
     
     
         6 . A method for actively abating sound waves of at least one primary sound wave emanating from a primary actuator that emits primary sound waves,
 in which method   by means of a reference sensor a reference signal of a primary sound wave is acquired;   by means of an error sensor an error signal of superimposed sound waves is acquired;   wherein the reference sensor and the error sensor are designed so as to be integrated in one sensor;   by means of couplings the error signal and the reference signal are transmitted to a regulator unit;   the regulator unit evaluates the transmitted signals, and a secondary signal is generated;   the secondary signal is transmitted by means of coupling to secondary actuators;   the secondary actuators are arranged on the margin of an open passage area for the primary sound waves; and   the secondary actuators from the transmitted secondary signal generate countersound waves which in the manner of a curtain are superimposed on the open passage area so that the primary sound wave that propagates through the open passage area is reduced or eliminated, wherein the steps are carried out repeatedly in a control circuit.   
     
     
         7 . An active countersound system arrangement, comprising an at least partly open control volume with an open passage area with a margin;
 comprising an active countersound system of  claim 1  for actively reducing the sound waves of the primary sound waves in the control volume.   
     
     
         8 . The use of an active countersound system for actively reducing sound waves for a control volume that is at least partly open. 
     
     
         9 . An active countersound system arrangement, comprising an at least partly open control volume with an open passage area with a margin;
 comprising an active countersound system of  claim 2  for actively reducing the sound waves of the primary sound waves in the control volume.   
     
     
         10 . An active countersound system arrangement, comprising an at least partly open control volume with an open passage area with a margin;
 comprising an active countersound system of  claim 3  for actively reducing the sound waves of the primary sound waves in the control volume.   
     
     
         11 . An active countersound system arrangement, comprising an at least partly open control volume with an open passage area with a margin;
 comprising an active countersound system of  claim 4  for actively reducing the sound waves of the primary sound waves in the control volume.   
     
     
         12 . An active countersound system arrangement, comprising an at least partly open control volume with an open passage area with a margin;
 comprising an active countersound system of  claim 5  for actively reducing the sound waves of the primary sound waves in the control volume.