Apparatus for the acoustic-ambience conditioning of a medium

Claim 1

AN APPARATUS FOR THE ACOUSTIC AMBIENCE CONDITIONING OF A MEDIUM, COMPRISING A FIRST INPUT STAGE FOR TRANSFORMING THE ACOUSTIC SIGNLS PRESENT IN SAID MEDIUM INTO ELECTRIC SIGNALS, AN ELECTRIC-SIGNAL GENERATOR CORRESPONDING TO THE BACKGROUND NOISE AND OPERATING CONTINUOUSLY, TWO CHANNELS CONNECTED IN PARALLEL, THE OUTPUTS OF THE GENERATOR AND OF THE INPUT STAGE BEING CONNECTED TO ONE ANOTHER AT THE COMMON INPUT OF THESE TWO CHANNELS THE FIRST CHANNEL COMPRISING A FILTER HAVING A FIRST RESPONSE CURVE AND A GATE CONTROLLING THE OPENING AND CLOSING OF SAID CHANNEL, THE SECOND CHANNEL INCLUDING A FILTER PRESENTING A SECOND RESPONSE CURVE AND A GATE CONTROLLING THE OPENING AND CLOSING OF SAID SECOND CHANNEL, A FIRST OUTPUT STAGE COMPRISING MEANS FOR TRANSFORMING THE ELECTRIC SIGNALS INTO ACOUSTIC SIGNALS, THE OUTPUTS OF SAID TWO CHANNELS BEING CONNECTED TO ONE ANOTHER, AT THE INPUT OF SAID FIRST OUTPUT STAGE, A SECOND OUTPUT STAGE COMPRISING MEANS FOR CONVERTING THE ELECTRIC SIGNALS INTO ACOUSTIC SIGNALS, THE OUTPUT OF THE FILTER OF SAID SECOND CHANNEL BEING CONNECTED DIRECTLY TO THE INPUT OF THE SECOND OUTPUT STAGE, THE APPARATUS BEING PROVIDED, IN ADDITION, WITH AN AUXILIARY CHANNEL CONNECTED AT THE OUTPUT OF THE INPUT STAGE, SAID AUXILIARY CHANNEL COMPRISING TRIGGERING MEANS GENERATING TWO CONTROL VOLTAGES APPLIED, RESPECTIVELY TO THE GATES OF SAID FIRST AND SAID SECOND CHANNELS, THESE CONTROL VOLTAGES BEING SELECTED IN SUCH A MANNER THAT, IN THE ABSENCE OF AN ACOUSTIC SIGNAL OF AN INTENSITY HIGHER THAN A PREDETERMINED THRESHOLD, APPLIED TO THE INPUT STAGE, THE FIRST CHANNEL WILL BE THE ONLY ONE TO BE UNBLOCKED, WHEREBY THE MEDIUM IS PLACED IN A FIRST STATE OF ACOUSTIC AMBIENCE WHEREIN THE INPUT SIGNALS DERIVED FROM A GENERATOR AND FROM SAID INPUT STAGE ARE TRANSMITTED TO SAID FIRST AND SAID SECOND OUTPUT STAGES, RESPECTIVELY, VIA THE FILTERS OF THE FIRST AND SECOND CHANNELS AND THAT, WHEN AN ACOUSTIC SIGNAL OF AN INTENSITY HIGHER THAN SAID THRESHOLD IS APPLIED TO THE INPUT STAGE, SAID FIRST CHANNEL WILL THUS BE BLOCKED WHEREAS SAID SECOND CHANNEL WILL BE UNBLOCKED, IN SUCH A MANNER THAT THE INPUT SIGNALS WILL THEN BE TRANSMITTED TO THE TWO OUTPUT STAGES, AFTER HAVING BEEN MODIFIED, IN THE SAME WAY, BY THE ONLY FILTER OF THE SECOND CHANNEL.

Claim 2

AN APPARATUS FOR THE ACOUSTIC AMBIENCE CONDITIONING OF A MEDIUM, COMPRISING A FIRST INPUT STAGE FOR TRANSFORMING THE ACOUSTIC SIGNLS PRESENT IN SAID MEDIUM INTO ELECTRIC SIGNALS, AN ELECTRIC-SIGNAL GENERATOR CORRESPONDING TO THE BACKGROUND NOISE AND OPERATING CONTINUOUSLY, TWO CHANNELS CONNECTED IN PARALLEL, THE OUTPUTS OF THE GENERATOR AND OF THE INPUT STAGE BEING CONNECTED TO ONE ANOTHER AT THE COMMON INPUT OF THESE TWO CHANNELS THE FIRST CHANNEL COMPRISING A FILTER HAVING A FIRST RESPONSE CURVE AND A GATE CONTROLLING THE OPENING AND CLOSING OF SAID CHANNEL, THE SECOND CHANNEL INCLUDING A FILTER PRESENTING A SECOND RESPONSE CURVE AND A GATE CONTROLLING THE OPENING AND CLOSING OF SAID SECOND CHANNEL, A FIRST OUTPUT STAGE COMPRISING MEANS FOR TRANSFORMING THE ELECTRIC SIGNALS INTO ACOUSTIC SIGNALS, THE OUTPUTS OF SAID TWO CHANNELS BEING CONNECTED TO ONE ANOTHER, AT THE INPUT OF SAID FIRST OUTPUT STAGE, A SECOND OUTPUT STAGE COMPRISING MEANS FOR CONVERTING THE ELECTRIC SIGNALS INTO ACOUSTIC SIGNALS, THE OUTPUT OF THE FILTER OF SAID SECOND CHANNEL BEING CONNECTED DIRECTLY TO THE INPUT OF THE SECOND OUTPUT STAGE, THE APPARATUS BEING PROVIDED, IN ADDITION, WITH AN AUXILIARY CHANNEL CONNECTED AT THE OUTPUT OF THE INPUT STAGE, SAID AUXILIARY CHANNEL COMPRISING TRIGGERING MEANS GENERATING TWO CONTROL VOLTAGES APPLIED, RESPECTIVELY TO THE GATES OF SAID FIRST AND SAID SECOND CHANNELS, THESE CONTROL VOLTAGES BEING SELECTED IN SUCH A MANNER THAT, IN THE ABSENCE OF AN ACOUSTIC SIGNAL OF AN INTENSITY HIGHER THAN A PREDETERMINED THRESHOLD, APPLIED TO THE INPUT STAGE, THE FIRST CHANNEL WILL BE THE ONLY ONE TO BE UNBLOCKED, WHEREBY THE MEDIUM IS PLACED IN A FIRST STATE OF ACOUSTIC AMBIENCE WHEREIN THE INPUT SIGNALS DERIVED FROM A GENERATOR AND FROM SAID INPUT STAGE ARE TRANSMITTED TO SAID FIRST AND SAID SECOND OUTPUT STAGES, RESPECTIVELY, VIA THE FILTERS OF THE FIRST AND SECOND CHANNELS AND THAT, WHEN AN ACOUSTIC SIGNAL OF AN INTENSITY HIGHER THAN SAID THRESHOLD IS APPLIED TO THE INPUT STAGE, SAID FIRST CHANNEL WILL THUS BE BLOCKED WHEREAS SAID SECOND CHANNEL WILL BE UNBLOCKED, IN SUCH A MANNER THAT THE INPUT SIGNALS WILL THEN BE TRANSMITTED TO THE TWO OUTPUT STAGES, AFTER HAVING BEEN MODIFIED, IN THE SAME WAY, BY THE ONLY FILTER OF THE SECOND CHANNEL.