Automatic reverberation control

Claim 1

IN COMBINATION; AN AMPLIFIER HAVING A FIRST AMPLIFYING SECTION AND A SECOND AMPLIFYING SECTION; A SIGNAL SOURCE COUPLED TO SAID FIRST AMPLIFYING SECTION; A LEVEL CONTROL CONNECTED BETWEEN SAID FIRST AND SAID SECOND AMPLIFYING SECTIONS, SAID LEVEL CONTROL INCLUDING A RESISTANCE ELEMENT AND A MOVABLE TAP THEREON FOR VARYING THE SIGNAL LEVEL INPUT TO SAID SECOND AMPLIFYING SECTION; A TRANSDUCER COUPLED TO SAID SECOND AMPLIFYING SECTION FOR CONVERTING ELECTRICAL SIGNALS INTO CORRESPONDING ACOUSTICAL SIGNALS; A REVERBERATION UNIT HAVING AN INPUT CIRCUIT COUPLED ACROSS SAID RESISTANCE ELEMENT AND AN OUTPUT CIRCUIT COUPLED TO SAID MOVABLE TAP ON SAID RESISTANCE ELEMENT; SAID REVERBERATION UNIT INCLUDING MEANS FOR ACCEPTING AT LEAST A PORTION OF THE SIGNAL IN SAID FIRST AMPLIFYING SECTION AND INTRODUCING A DELAY IN THE ACCEPTED SIGNAL BETWEEN SAID INPUT CIRCUIT AND SAID OUTPUT CIRCUIT, WHEREBY VARIATIONS IN THE LEVEL OF THE REVERBERATED SIGNAL FED TO SAID SECOND AMPLIFYING SECTION OCCUR IN ACCORDANCE WITH A NONLINEAR FUNCTION OF THE SETTING OF SAID MOVABLE TAP.