A plurality of piezoelectric wafers 18 separated by brass discs 19 are secured between the stub 14 and piston 16 and are operatively connected to an amplifier and oscillator, shown schematically at 20 in FIG. The driver 12 comprises a stub or a base 14 and a solid cylindrical metallic piston 16. 1, a hollow concave or flat axisymmetric dish 10 is secured to and axisymmetrically loaded by the output end of a conventional driver 12. Clair device, and can produce more intense sound per unit of input energy.Īs shown in FIG. The device of the present invention is therefore more efficient than prior art devices, i.e., more than 10 times efficient than a St. Unlike prior art sound devices such as loudspeakers which are akin to a high impedance reciprocating piston, the dish-shaped device is capable of elastically flexing in its resonant mode at a relatively large amplitude relative to the amplitude of the transducer, and is more nearly matched to the impedance of the air. The dish is caused to flex, with the outer perimeter having a degree of movement or displacement which is many times greater than the movement of the transducer. This allows the diameter of the dish to be more than several wavelengths of the sound being produced. The final or output transformer is in the form of a dish having a portion coupled to a vibrating source, with the outer perimeter of the dish being unsupported and preferably thinner and hence more flexible than near the center. In accordance with the present invention, a sound transducer having a high impedance relative to air is coupled with mechanical transformers, by which the impedance at the final transformer more closely matches the impedance of the air or other sound transmitting medium, and the sound is propagated primarily along or within a beam. Y10T74/10- High frequency vibratory devices.Y10T74/00- Machine element or mechanism.Y10T- TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION.Y10- TECHNICAL SUBJECTS COVERED BY FORMER USPC. ![]() Y- GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS AND DIGESTS.B06B3/02- Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving a change of amplitude.B06B3/00- Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency.FOR PERFORMING MECHANICAL WORK IN GENERAL B06B- METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g.B06- GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL.Application granted granted Critical Publication of US4757227A publication Critical patent/US4757227A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Assignors: DANLEY, THOMAS J., MERKLEY, DENNIS R., REY, CHARLES A. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Intersonics Inc filed Critical Intersonics Inc Priority to US06/842,931 priority Critical patent/US4757227A/en Assigned to INTERSONICS INCORPORATED reassignment INTERSONICS INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee Intersonics Inc Priority date (The priority date is an assumption and is not a legal conclusion. ![]() Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Rey Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US06/842,931 Inventor Thomas J. ![]() Google Patents Transducer for producing sound of very high intensityÄownload PDF Info Publication number US4757227A US4757227A US06/842,931 US84293186A US4757227A US 4757227 A US4757227 A US 4757227A US 84293186 A US84293186 A US 84293186A US 4757227 A US4757227 A US 4757227A Authority US United States Prior art keywords dish transducer sound base impedance Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4757227A - Transducer for producing sound of very high intensity US4757227A - Transducer for producing sound of very high intensity
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |