Accession Number : AD0634249

Title :   EVALUATION OF LOW-FREQUENCY, BROAD-BAND, FREE-FLOODING MAGNETOSTRICTIVE SCROLL TRANSDUCERS.

Descriptive Note : Research rept.,

Corporate Author : NAVY UNDERWATER SOUND LAB NEW LONDON CONN

Personal Author(s) : Meyers, Theodore J.

Report Date : 14 JUN 1966

Pagination or Media Count : 16

Abstract : The report presents the experimental results of the evaluation of low-frequency, broad-band, free-flooding magnetostrictive scroll transducers, the design of which is based upon previous work done with high-frequency models. The bandwidth of free-flooding magnetostrictive scroll transducers may be increaded by properly coupling (or staggering) the cavity and mechanical ring resonant frequencies of the transducer. It is possible to achieve a usable bandwidth of about one octave; however, the broad-band scrolls have greater weight and lower peak efficiency than do the narrow-band scrools. In spite of their greater weight, free-flooding magnetostrictive scroll transducers have advantages over other types of transducers in that they are rugged, reliable, and easily constructed; they should be highly resistant to damage from explosive shock; and they are insensitive to hydrostatic pressure. In some applications, the advantages of free-flooding magnetostrictive scroll transducers may far outweigh their disadvantages. (Author)

Descriptors :   (*MAGNETOSTRICTIVE ELEMENTS, *TRANSDUCERS), UNDERWATER SOUND EQUIPMENT, EXTREMELY LOW FREQUENCY, BROADBAND, CAVITY RESONATORS, RINGS, MAGNETOSTRICTION, SOUND TRANSMISSION

Subject Categories : Electrical and Electronic Equipment
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE