Sound deadener and absorber

Claim 1

AN ARTICLE OF MANUFACTURE COMPRISING A SHEETLIKE, VIBRATILE ELEMENT HAVING ATTACHED TO A SURFACE THEREOF, A SOUND DEADENING AND ABSORBING ARTICLE COMPRISING A PLURALITY OF FLEXIBLE, POROUS, FIBROUS BLANKETS HAVING A NOISE REDUCTION COEFFICIENT OF AT LEAST 0.20 SEPARATED BY A DENSE, HEAVY, SUBSTANTIALLY CONTINUOUS INTERLAYER HAVING A SURFACE DENSITY OF AT LEAST ONE OUNCE PER SQUARE FOOT AND CONSISTING ESSENTIALLY OF AN UNVULCANIZED MIXTURE OF 10 TO 30 PARTS BY WEIGHT OF POWDERED, VULCANIZED RUBBER, 10 TO 30 PARTS BY WEIGHT OF UNVULCANIZED LATEX AND 10 TO 100 PARTS BY WEIGHT OF GRANULAR FILLER MATERIAL, SAID MIXTURE BEING FREE FROM A VULCANIZING AGENT AND ONE OF SAID FIBROUS BLANKETS BEING POSITIONED BETWEEN THE SOUND DEADENING MATERIAL AND THE VIBRATILE STRUCTURE AND BEING ATTACHED IN SUBSTANTIALLY CONTINUOUS, FACE TO FACE, TOUCHING RELATIONSHIP WITH THE VIBRATILE ELEMENT, SAID SOUND DEADENING AND ABSORBING ARTICLE HAVING A NOISE REDUCTION COEFFECIENT OF AT LEAST 0.35 AND A SOUND DEADENING ABILITY OF AT LEAST 25 DECIBELS PER SECOND AT 160 CYCLES PER SECOND WHEN TREATED AS DESCRIBED.