Elements of acoustical engineering (1940) Elements of acoustical engineering elementsofacoust00olso Year: 1940 EDGEWISE WOUND RIBBON Fig. Cones and voice coils. Sectional views. A. Felted paper cone. B. Developed paper cone with leather outside suspension. C. Voice coil wound with round wire. D. Voice coil with edgewise wound ribbon. compliances serve to reduce the effective mass of the vibrating system. The corrugations also add rigidity to the cone in a radial direction. The cone shown in Fig. is developed from a flat sheet of paper. A leather outside suspension is used with thi
Elements of acoustical engineering (1940) Elements of acoustical engineering elementsofacoust00olso Year: 1940 EDGEWISE WOUND RIBBON Fig. Cones and voice coils. Sectional views. A. Felted paper cone. B. Developed paper cone with leather outside suspension. C. Voice coil wound with round wire. D. Voice coil with edgewise wound ribbon. compliances serve to reduce the effective mass of the vibrating system. The corrugations also add rigidity to the cone in a radial direction. The cone shown in Fig. is developed from a flat sheet of paper. A leather outside suspension is used with this cone. For voice coil and centering systems two general classes are used, namely: inside and outside sus- pensions. The inside suspension is some form of slotted disk. The outside suspension shown is a corrugated disk. Slotted disks are also used for outside suspensions. The simplest voice coil construction consists of round enameled wire wound on a paper cyhnder (Fig. ). The ends of the voice coil are soldered to flexible leads anchored to the cone. The ratio of the volume of the conductor in the air gap to the air gap volume should be as large as possible to make efficient use of the air gap flux. Certain reasonable
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