A Noise and Wear Reducing Phonograph Reproducer with Controlled Response

Abstract

A replaceable phonograph needle having a large radius stylus, a spring mounting and controlled damping has been developed in cooperation with Mr. John Reid. Improved results are obtained in record and stylus wear, reduction of acoustic radiation and the ability to reproduce complex passages of large amplitude. In addition, this new needle affords protection against accidental damage to the stylus point and to the surface of the record. It is shown that by proper choice of constants it is also possible to eliminate compensating networks and thereby effect an increase in reproducer output. This device is in current production by the Webster Electric Company of Racine, Wisconsin, and is used on the Crosley radio phonograph combinations. (The presentation of this paper will be accompanied by demonstrations of the benefits obtained with the new needle using sound reproduction, oscillographic illustration and slides.)